1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 * Installation Changes in Emacs 24.4
20 ** Emacs can now be compiled with ACL (access control list) support.
21 This happens by default if a suitable support library is found at
22 build time, like libacl on GNU/Linux. To prevent this, use the
23 configure option `--disable-acl'. See below for the features this provides.
25 ** Emacs can now be compiled with file notification support.
26 This happens by default if a suitable system library is found at
27 build time. To prevent this, use the configure option
28 `--without-file-notification'. See below for file-notify features.
29 This feature is not available for the Nextstep port.
31 ** Emacs can now be compiled with zlib support.
32 This happens by default if zlib is present, which it normally is.
33 To prevent this, use the configure option `--without-zlib'.
34 This provides the function `zlib-decompress-region'; see below for details.
36 ** The configure option `--without-compress-info' has been generalized,
37 and renamed to `--without-compress-install'. It now prevents compression
38 of _any_ files during installation.
40 ** The configure option `--with-crt-dir' has been removed.
41 It is no longer needed, as the crt*.o files are no longer linked specially.
43 ** Directories passed to configure option `--enable-locallisppath' are
44 no longer created during installation.
46 ** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
47 This requires pkg-config to be available at build time.
50 * Startup Changes in Emacs 24.4
52 ** When initializing `load-path', an empty element in the EMACSLOADPATH
53 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
54 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
55 load-path (the one that would have been used if EMACSLOADPATH was unset).
56 This makes it easier to _extend_ the load-path via EMACSLOADPATH
57 (previously, EMACSLOADPATH had to specify the complete load-path,
58 including the defaults). (In older versions of Emacs, an empty element
59 was replaced by ".", so use an explicit "." now if that is what you want.)
61 ** The -L option, which normally prepends its argument to load-path,
62 will instead append, if the argument begins with `:' (or `;' on MS Windows;
63 i.e., `path-separator').
65 ** If you use either site-load.el or site-init.el to customize the dumped
66 Emacs executable, any changes to `load-path' that these files make
67 will no longer be present after dumping. To affect a permanent change
68 to `load-path', use the `--enable-locallisppath' option of `configure'.
70 ** The user option `initial-buffer-choice' can now specify a function
71 to set up the initial buffer.
74 * Changes in Emacs 24.4
76 ** Support for ACLs (access control lists).
77 This requires a suitable support library to be found at build time.
78 On GNU/Linux, the POSIX ACL interface is used via libacl.
79 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
80 ACLs are extended file attributes, used e.g. for finer-grained permissions.
82 *** Emacs preserves the ACL entries of files when backing up.
84 *** New functions `file-acl' and `set-file-acl' get and set file ACLs.
86 ** Support for menus on text-mode terminals.
87 If the terminal supports a mouse, clicking on the menu bar, or on
88 sensitive portions of the mode line or header line, will drop down the
89 menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
90 C-mouse-3 on the text area will pop up the menus defined for those locations.
92 If the text terminal does not support a mouse, you can activate the
93 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
95 If you want the previous behavior, where F10 invoked `tmm-menubar',
96 customize the option `tty-menu-open-use-tmm' to a non-nil value.
97 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
100 ** New option `load-prefer-newer' affects how the `load' function chooses
101 the file to load. If this is non-nil, then when both .el and .elc
102 versions of a file exist, and the caller did not explicitly specify
103 which one to load, then the newer file is loaded. The default, nil,
104 means to always load the .elc file.
106 ** Multi-monitor support
108 *** New functions `display-monitor-attributes-list' and
109 `frame-monitor-attributes' can be used to obtain information about
110 each physical monitor on multi-monitor setups.
112 *** The functions `display-pixel-width' and `display-pixel-height' now
113 behave consistently among the platforms: they return the pixel width
114 or height for all physical monitors associated with the given display
115 as if they were on X. To get information for each physical
116 monitor, use the new functions above. Similar notes also apply to
117 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
118 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
120 ** New function `zlib-decompress-region', which decompresses gzip- and
121 zlib-format compressed data using built-in zlib support (if available).
123 ** The *Messages* buffer is created in `messages-buffer-mode',
124 a new major mode, with read-only status. Any code that might create
125 the *Messages* buffer should call the function `messages-buffer' to do
126 so and set up the mode.
128 ** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
129 You can change the default by customizing `blink-cursor-blinks'.
131 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
132 This affects View mode, etc.
134 ** The default value of `make-backup-file-name-function' is no longer nil.
135 Instead it defaults to a function that does what the nil value used to.
139 *** The command `apropos-variable' is renamed to `apropos-user-option'.
140 `apropos-user-option' shows all user options, while `apropos-variable'
141 shows all variables. When called with a universal prefix argument,
142 the two commands swap their behaviors. When `apropos-do-all' is
143 non-nil, they output the same results.
145 *** The key `?' now describes prefix bindings, like `C-h'.
147 *** The command `describe-function' has been extended for EIEIO.
148 Running it on constructors will show a full description of the
149 generated class. For generic functions, it will show all
150 implementations together with links to the source. The old commands
151 `describe-class', `describe-constructor' and `describe-generic' were
154 *** The function `quail-help' is no longer an interactive command.
155 Use `C-h C-\' (`describe-input-method') instead.
157 ** Frame and window handling
159 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
160 bound to <f11> and M-<f10>, respectively.
162 *** New hooks `focus-in-hook', `focus-out-hook'.
163 These are normal hooks run when an Emacs frame gains or loses input focus.
165 *** The function `window-in-direction' now takes additional arguments
166 for specifying a reference point, wrapping the selection around frame
167 borders, and specifying ways to select the minibuffer window.
169 *** Emacs can now change frame sizes in units of pixels, rather than
170 text rows or columns. When maximizing a frame or making it fullscreen,
171 remaining extra pixels are no longer given to the minibuffer, the rightmost
172 fringe, or other unusable space, but are distributed among the text
173 areas of the frame's windows. If the new option `frame-resize-pixelwise'
174 is non-nil, all frame size changes happen pixelwise and set the
175 corresponding size hints for the window manager.
177 *** Emacs can now change window sizes in units of pixels.
178 Mouse-dragging a mode line or window divider now changes the size of
179 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
180 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
181 resize windows pixelwise. Most functions for changing or accessing
182 window sizes now have an additional argument that allows changes to apply,
183 or values to be returned, in pixels instead of lines/columns.
185 *** The functions `window-body-height' and `window-body-width' now never
186 count partially visible lines or columns if called with a nil PIXELWISE
189 *** Emacs can now draw dividers between adjacent windows. To put
190 dividers between side-by-side/vertically stacked windows customize the
191 frame parameters `right-divider-width' and `bottom-divider-width' to
192 some positive integer. You can drag dividers with the mouse (they show
193 a corresponding cursor when the mouse hovers over them). You can change
194 the appearance of dividers by customizing the faces `window-divider',
195 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
196 two are useful to provide a 3D effect, or to better distinguish dividers
197 from surrounding display objects.
199 *** New functions to return the pixel sizes of window components, namely
200 `window-scroll-bar-width', `window-mode-line-height',
201 `window-header-line-height', `window-right-divider-width', and
202 `window-bottom-divider-width'.
204 *** The new function `window-text-pixel-size' returns the size of the
205 text of a window's buffer in pixels. This allows functions like
206 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
207 window to its buffer as it will be displayed.
209 *** `fit-window-to-buffer' can now resize windows in both dimensions.
210 This behavior is controlled by the new option
211 `fit-window-to-buffer-horizontally'. The new option
212 `fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
214 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
215 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
216 control the size of the frame and its position on screen.
218 *** Temp Buffer Resize Mode can now adjust the height and width of
219 windows and frames. The new option `temp-buffer-max-width' allows you to
220 control the width of temporary buffer windows. Moreover, if the new
221 option `fit-frame-to-buffer' is non-nil and the buffer appears in the
222 root window of a frame, Temp Buffer Resize Mode will try to adjust the
223 width and/or height of the frame.
225 *** `split-window' is now a non-interactive function, not a command.
226 As a command, it was a special case of `C-x 2' (`split-window-below'),
227 and as such superfluous. After being reimplemented in Lisp, its
228 interactive form was mistakenly retained.
230 *** The functions `window-size' and `window-total-size' now have an
231 optional argument to return a rounded size value.
233 *** `window-state-put' now allows you to put a window state into internal
236 *** New option `scroll-bar-adjust-thumb-portion'.
237 Available only on X, this option allows you to control over-scrolling
238 using the scroll bar (i.e., dragging the thumb down even when the end
239 of the buffer is visible).
241 *** New display actions functions for `display-buffer':
243 **** `display-buffer-in-previous-window' displays a buffer in a window
244 previously showing that buffer.
246 **** `display-buffer-at-bottom' chooses or creates a window at the
247 bottom of the selected frame.
249 **** `display-buffer-no-window' to not display the buffer in a window.
251 *** New display action alist entry `allow-no-window' to indicate the
252 caller of `display-buffer' is ready to handle the case of not displaying
253 the buffer in a window.
257 *** `eval-defun' on an already defined defcustom calls the :set function,
260 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
261 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
262 zero prefix argument. This disables truncation of lists in the output,
263 equivalent to setting `(eval-expression-)print-length' and
264 `(eval-expression-)print-level' to nil. Additionally, it causes integers
265 to be printed in other formats (octal, hexadecimal, and character).
267 *** New hook `eval-expression-minibuffer-setup-hook' run by
268 `eval-expression' on entering the minibuffer.
270 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
271 because it affects caching of paragraph scanning results as well.
272 There is no reason to set this to nil except for debugging purposes.
274 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
275 and works for git too, if you fetch the repository notes.
277 ** The default value of `comment-use-global-state' is now t,
278 and this variable has been marked obsolete.
280 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
282 ** The option `set-mark-default-inactive' has been deleted.
283 This unfinished feature was introduced by accident in Emacs 23.1;
284 simply disabling Transient Mark mode does the same thing.
287 * Editing Changes in Emacs 24.4
291 *** `electric-indent-mode' is now enabled by default.
292 Typing RET reindents the current line and indents the new line.
293 `C-j' inserts a newline but does not indent. In some programming modes,
294 additional characters are electric (eg `{').
296 *** New buffer-local `electric-indent-local-mode'.
298 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
299 When invoked without a prefix argument, it now activates a transient
300 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
301 the text indentation in the region. Typing any other key resumes
302 normal editing behavior.
304 *** `tab-stop-list' is now implicitly extended to infinity by repeating
305 the last step. Its default value is changed to nil, which means a tab
306 stop every `tab-width' columns.
308 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
309 In other words, if you visit two files that have the same base name,
310 then rather than creating buffers basename and basename<2>,
311 Emacs uses basename<dirA> and basename<dirB>. To change this,
312 customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
314 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
315 Most commands are still unaware of it, but kill/yank do work on the rectangle.
317 ** New option `visual-order-cursor-movement'.
318 If this is non-nil, cursor motion with arrow keys will follow the
319 visual order of characters on the screen: <left> always moves to the
320 left, <right> always moves to the right, disregarding the surrounding
321 bidirectional context.
323 ** New command `delete-duplicate-lines'.
324 This searches the region for identical lines, and removes all but one
325 copy of each repeated line. The lines need not be sorted.
327 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
328 When called in succession, it cycles between spacing conventions:
329 one space, no spaces, original spacing.
331 ** `blink-matching-paren' now only highlights the matching open-paren
332 by default, instead of moving the cursor. Set this variable to `jump' to
333 restore the old behavior.
335 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
336 a line after a one-letter word, which is an error in some typographical
337 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
341 *** All interactive commands that read a register (`copy-to-register', etc.)
342 now display a temporary window after `register-preview-delay' seconds
343 that summarizes existing registers. To disable this, set that option to nil.
344 Interactive commands that read registers and want to make use of this
345 should use `register-read-with-preview' to read register names.
347 *** New command `frameset-to-register' bound to `C-x r f', replacing
348 `frame-configuration-to-register'. It offers similar functionality,
349 plus enhancements like the ability to restore deleted frames.
350 (`frame-configuration-to-register' still exists, but no longer has a
353 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
357 * Changes in Specialized Modes and Packages in Emacs 24.4
359 ** Backtrace and debugger
361 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
362 display of local variables of the current stack frame.
364 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
365 the lexical environment when evaluating the code in the context at point
366 (and so allows you to access lexical variables).
368 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
370 ** Battery information can now be retrieved from BSD's `apm' utility.
372 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
376 *** Calc by default now uses the Gregorian calendar for all dates, and
377 uses January 1, 1 AD as its day number 1. Previously Calc used the
378 Julian calendar for dates before September 14, 1752, and it used
379 December 31, 1 BC as its day number 1; the new scheme is more
380 consistent with Calendar's calendrical system and day numbering.
382 *** The new option `calc-gregorian-switch' lets you configure if
383 (and when) Calc switches from the Julian to the Gregorian calendar.
385 *** Support for ISO 8601 dates.
387 ** Calendar and Diary
389 *** New faces `calendar-weekday-header', `calendar-weekend-header',
390 and `calendar-month-header'.
392 *** New option `calendar-day-header-array'.
394 *** New variable `diary-from-outlook-function', used by the command
395 `diary-from-outlook'.
397 *** The variable `calendar-font-lock-keywords' is obsolete.
403 **** The cpp-root project now supports executing a compile command.
404 It can be set through the new :compile-command slot or the
405 buffer-local variable `compile-command'.
407 **** Better selection of include directories for the 'linux' project.
408 Include directories now support out-of-tree build directories and
409 target architecture auto-detection.
413 **** Improved detection of used namespaces in current scope in C++.
415 **** Parsing of default values for variables and function arguments in C/C++.
416 They are also displayed by the summarize feature in the mode line.
418 **** Improved parsing of function pointers in C/C++.
419 This also includes parsing of function pointers as function arguments.
421 **** Parsing of C/C++ preprocessor macros that open new scope.
422 For example, this enables parsing of macros that open new namespaces.
424 **** Support for 'this' pointer in inline member functions in C++.
428 *** Support for completion, ElDoc, and Flycheck has been added.
430 *** The current CFEngine syntax is parsed from "cf-promises -s json".
431 There is a fallback syntax available if you don't have cf-promises or
432 if your version doesn't support that option. See option `cfengine-cf-promises'.
436 *** New macro `cl-tagbody'.
437 This executes statements while allowing for control transfer to labels.
439 *** letf is now just an alias for cl-letf.
443 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
444 Hence, you can now enable it independently from those modes, and from
445 `transient-mark-mode'.
447 *** `cua-highlight-region-shift-only' is now obsolete.
448 You can disable `transient-mark-mode' to get the same result.
450 *** CUA's rectangles can now be used without CUA by calling the command
451 `cua-rectangle-mark-mode'.
453 ** Delete Selection mode can now be used without Transient Mark mode.
457 *** `desktop-save-mode' by default now auto-saves an existing desktop file
458 after `desktop-auto-save-timeout'. To disable this, customize that option
461 *** Desktop now saves and restores the frame/window configuration.
462 To disable this, set `desktop-restore-frames' to nil.
463 See also related options `desktop-restore-reuses-frames',
464 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
466 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
467 such as file ownership or permissions, are visible in Dired buffers.
468 See the new options `dired-hide-details-hide-symlink-targets' and
469 `dired-hide-details-hide-information-lines' for customizing what to hide.
471 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
472 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
473 The results display in the mode line.
475 ** Electric Pair mode
477 *** New option `electric-pair-preserve-balance', enabled by default.
478 If non-nil, pairing/skipping only kicks in when that help the balance
479 of parentheses and quotes; i.e., the buffer should end up at least as
482 You can further control this behavior by adjusting the predicates
483 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
485 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
486 In `electric-pair-mode', the commands `backward-delete-char' and
487 `backward-delete-char-untabify' are now bound to electric variants
488 that delete the closer when invoked between adjacent pairs.
490 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
491 In `electric-pair-mode', inserting a newline between adjacent pairs
492 opens an extra newline after point, which is indented if
493 `electric-indent-mode' is also set.
495 *** New option `electric-pair-skip-whitespace', enabled by default.
496 This controls if skipping over closing delimiters should jump over any
497 whitespace slack. Setting it to `chomp' makes it delete this
498 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
500 *** New variables control the pairing in strings and comments.
501 You can customize `electric-pair-text-pairs' and
502 `electric-pair-text-syntax-table' to tweak pairing behavior inside
503 strings and comments.
505 ** New EPA option `epa-mail-aliases'.
506 You can set this to a list of email address aliases that `epa-mail-encrypt'
507 should use to find keys.
509 ** New ERC option `erc-accidental-paste-threshold-seconds'.
510 If set to a number, this can be used to avoid accidentally pasting large
511 amounts of data into the ERC input.
513 ** New ERT macro `skip-unless' allows skipping ERT tests.
517 *** `eshell' now supports visual subcommands and options.
518 Eshell has been able to handle "visual" commands (interactive,
519 non-line oriented commands such as top that require display
520 capabilities not provided by eshell) by running them in an Emacs
521 terminal emulator. See `eshell-visual-commands'.
523 This feature has been extended to subcommands and options that make a
524 usually line-oriented command a visual command. Typical examples are
525 "git log" and "git <command> --help", which display their output in a
526 pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
528 *** New Eshell-Tramp module.
529 External su and sudo commands are now the default; the internal,
530 Tramp-using variants can still be used by enabling the eshell-tramp module.
532 ** New F90 mode option `f90-smart-end-names'.
534 ** New option `gnutls-verify-error', if non-nil, means that Emacs
535 should reject SSL/TLS certificates that GnuTLS determines as invalid.
536 (This option defaults to nil at present, but this is expected to change
537 in a future release.)
541 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
542 the symbol near point.
544 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
545 will cycle through faces in `hi-lock-face-defaults' without prompting.
547 ** Icomplete is now more similar to Ido.
549 *** Icomplete by default now applies to all forms of minibuffer completion.
550 The variable `icomplete-with-completion-tables' (now a user option)
551 controls this. To restore the old behavior, set it back to
552 '(internal-complete-buffer).
554 *** You can navigate through and select completions using the keys
555 from `icomplete-minibuffer-map'.
557 *** The string that separates potential completions is now a customizable
558 option (`icomplete-separator'). The default is " | " rather than ",".
560 *** New face `icomplete-first-match'; and new options
561 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
563 *** The option `icomplete-show-key-bindings' has been removed.
567 *** An Ido user manual is now included.
569 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
570 This means to use virtual buffers if the current ido input does not match
573 *** The variable `ido-decorations' can optionally have two new elements,
574 which are the brackets to use around the sole remaining completion.
578 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
579 visit the next image file and the previous image file in the same
580 directory, respectively.
582 *** New commands to show specific frames of multi-frame images.
583 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
584 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
586 *** New commands to speed up, slow down, or reverse animation.
587 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
588 speed up and slow down the animation. `a r' (`image-reverse-speed')
589 to reverse it and `a 0' (`image-reset-speed') to reset it.
591 *** The command `image-mode-fit-frame' deletes other windows.
592 When toggling, it restores the frame's previous window configuration.
593 It also has an optional frame argument, which can be used by Lisp
594 callers to fit the image to a frame other than the selected frame.
596 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
600 *** New Info face `info-index-match', used to highlight matches in index
601 entries displayed by `Info-index-next', `Info-virtual-index' and
604 *** The Info-edit command is obsolete. Editing Info nodes by hand
605 has not been relevant for some time.
609 *** New option `js-switch-indent-offset'.
611 *** Better indentation of multiple-variable declarations.
612 If a declaration spans several lines, variables on the following lines
613 are lined up to the first one.
615 *** Recognition and better indentation of continuations in array comprehensions.
617 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
621 *** Font locking for Texinfo comments and new keywords.
623 *** Completion in Octave file buffers.
627 *** Jump to definition.
629 *** Documentation lookup/search.
631 ** OPascal mode is the new name for Delphi mode
633 *** All delphi-* variables and functions have been renamed to opascal-*.
634 Obsolete aliases exist for those likely to have been used externally.
636 *** The option `delphi-newline-always-indents' has been removed.
637 Use `electric-indent-mode' instead.
639 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
643 *** The package library now supports digital signing of packages.
644 Maintainers of package archives should consider signing their packages
647 **** If the user option `package-check-signature' is non-nil,
648 Emacs tries to check package signatures at install time.
649 The value `allow-unsigned' allows installation of unsigned packages.
651 **** The user option `package-unsigned-archives' lists archives where
652 Emacs will not try to check signatures.
654 *** New option `package-pinned-packages'. This is useful if you have multiple
655 archives enabled, with more than one offering a given package that you want.
657 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
658 to filter the list of packages by a keyword.
660 *** In the `describe-package' buffer, there are now buttons listing the
661 keywords related to the package. Click on a button to see other packages
662 related to that keyword.
664 *** The format of `archive-contents' files, generated by package
665 repositories, has changed to allow a new (fifth) element in the data
666 vectors, containing an associative list with extra properties.
667 (For example, `describe-package' uses the `:url' extra property to
668 display a "Homepage" header.)
670 ** In Prolog mode, `prolog-use-smie' has been removed,
671 along with the non-SMIE indentation code.
675 *** The new command `remember-notes' creates a buffer that is saved on exit.
676 You can use it as a more permanent *scratch* buffer.
678 *** Remember can now store notes in separate files.
679 To use this, add `remember-store-in-files' to the `remember-handler-functions'
680 option. The files are saved in `remember-data-directory' using
681 names specified by `remember-directory-file-name-format'.
685 *** Customize `rmail-mbox-format' to influence some minor aspects of
686 how Rmail displays non-MIME messages.
688 *** The `unrmail' command now converts from BABYL to mboxrd format,
689 rather than mboxo. Customize `unrmail-mbox-format' to change this.
693 *** Improved syntax highlighting and indentation.
695 *** New `electric-indent-mode' integration.
697 *** New option `ruby-encoding-magic-comment-style'.
699 *** New option `ruby-custom-encoding-magic-comment-template'.
701 *** New option `ruby-align-to-stmt-keywords'.
703 *** New option `ruby-align-chained-calls'.
705 *** More Ruby file types have been added to `auto-mode-alist'.
707 ** Search and Replace
709 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
710 starts a symbol (identifier) incremental search forward with the
711 symbol found near point added to the search string initially.
713 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
714 and adds it to the search string.
716 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
718 *** `query-replace' skips invisible text when `search-invisible' is nil,
719 and opens overlays with hidden text when `search-invisible' is `open'.
721 *** A negative prefix argument of replacement commands replaces backward.
722 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
723 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
725 *** By default, prefix arguments do not now terminate Isearch mode.
726 Set `isearch-allow-prefix' to nil to restore the old behavior.
728 *** More Isearch commands accept prefix arguments, namely
729 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
732 *** Word search now matches whitespace at the beginning/end
733 of the search string if it contains leading/trailing whitespace.
734 In an incremental word search or when using a non-nil LAX argument
735 of `word-search-regexp', the lax matching can also match part of
736 the first word (in addition to the lax matching of the last word).
737 The same rules are now applied to the symbol search, with the difference
738 that it matches symbols, and non-symbol characters between symbols.
740 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
742 ** The shell.el option `explicit-bash-args' includes --noediting by default.
743 All non-ancient Bash versions support this option.
747 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
749 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
753 *** You can customize the SMIE indentation of a mode via `smie-config'.
754 The command `smie-config-guess' can help you derive the appropriate
755 indentation settings, if you provide it with an indented sample file.
756 Use `smie-config-save' to save the result.
758 *** You can customize the SMIE indentation of a file by adding an entry to
759 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
761 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
765 *** Improved login monitoring and appropriate response to login failures.
766 New variable `sql-login-delay' defines maximum wait time for a connection.
769 SQL*Plus script placeholders are properly highlighted and identified
770 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
771 are passed before the logon parameter, as required. The default now
772 includes `-L', to limit the number of logon attempts per invocation.
774 ** New Term mode option `term-suppress-hard-newline'.
776 ** Todo mode has been rewritten and enhanced.
777 The Todo mode user manual describes all commands and most user
778 options. To support some of these features, a new file format is
779 used, which is incompatible with the old format; however, you can
780 convert old todo and done item files to the new format on initializing
781 the first new todo file, or at any later time with the provided
782 conversion command. The previous version of todo-mode.el has been
783 renamed to otodo-mode.el and is now obsolete. New features include:
785 *** Support for multiple todo files and archive files of done items.
787 *** Renaming, reordering, moving, merging, and deleting categories.
789 *** Sortable tabular summaries of categories and the item types they contain.
791 *** Cross-category lists of items filtered by specific criteria.
793 *** More fine-grained interaction with the Emacs diary, by being able to
794 decide for each todo item whether it appears in the Fancy Diary display.
796 *** Highly flexible new item insertion and item editing.
798 *** Moving items between categories, storing done items in their category
799 or in archive files, undoing or unarchiving done items.
801 *** Reprioritizing items by inputting a numerical priority.
803 *** Extensive customizability of operation and display, including many faces.
807 *** `trace-function' and `trace-function-background' no longer prompt for
808 the output buffer. Unless you use a prefix argument, they output to
811 *** With a prefix argument, `trace-function' and `trace-function-background'
812 will prompt for a "context". This is a Lisp expression, whose value at the
813 time the function is entered/exited is printed along with the function's
818 *** New connection method "adb", which allows to access Android
819 devices by the Android Debug Bridge. The variable `tramp-adb-program'
820 can be used to adapt the path of the "adb" program, if needed.
822 *** Handlers for `file-acl' and `set-file-acl' for remote machines
823 that support POSIX ACLs.
825 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
826 for remote machines that support filesystem notifications.
828 *** The experimental url syntax for remote file names has been removed.
830 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
831 "scpc" and "rsyncc" are discontinued. The ssh option
832 "ControlMaster=auto" is set automatically in all ssh-based methods,
833 when possible. See `tramp-use-ssh-controlmaster-options'.
835 ** New URL command `url-cookie-list' displays the current cookies,
836 and allows you to interactively remove cookies.
838 ** VC and related modes
840 *** In VC directory mode, `D' displays diffs between VC-controlled
841 whole tree revisions.
843 *** In VC directory mode, `L' lists the change log for the current VC
844 controlled tree in a window.
846 *** In VC directory mode, `I' shows a log of changes that will be
847 received with a pull operation.
849 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
850 under current version control system. When called with a prefix
851 argument, you can remove a file from the ignored file list.
855 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
857 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
859 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
860 are obsolete. Customize the `woman-*' faces instead.
862 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
864 ~/.emacs.d/timelog replaces ~/.timelog
865 ~/.emacs.d/vip replaces ~/.vip
866 ~/.emacs.d/viper replaces ~/.viper
867 ~/.emacs.d/ido.last replaces ~/.ido.last
868 ~/.emacs.d/kkcrc replaces ~/.kkcrc
869 ~/.emacs.d/quickurls replaces ~/.quickurls
870 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
871 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
872 ~/.emacs.d/places replaces ~/.emacs-places
873 ~/.emacs.d/shadows replaces ~/.shadows
874 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
875 ~/.emacs.d/strokes replaces ~/.strokes
876 ~/.emacs.d/notes replaces ~/.notes
877 ~/.emacs.d/type-break replaces ~/.type-break
878 Also the following files used by the now obsolete otodo-mode.el:
879 ~/.emacs.d/todo-do replaces ~/.todo-do
880 ~/.emacs.d/todo-done replaces ~/.todo-done
881 ~/.emacs.d/todo-top replaces ~/.todo-top
885 *** iswitchb.el; use icomplete-mode.
887 *** longlines.el; use visual-line-mode.
893 *** terminal.el; use term.el instead.
895 *** the old version of todo-mode.el (renamed to otodo-mode.el).
897 *** xesam.el (owing to the cancellation of the XESAM project).
899 *** yow.el; use fortune.el or cookie1.el instead.
902 * New Modes and Packages in Emacs 24.4
904 ** New package eww.el provides a built-in web browser.
905 This requires Emacs to have been compiled with libxml2 support.
907 ** New package nadvice.el offers lighter-weight advice facilities.
910 *** `add-function'/`remove-function', which can be used to add/remove code on
911 any function-carrying place, such as process filters or `<foo>-function' hooks.
913 *** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
914 function, much like `defadvice' does.
916 ** New package frameset.el provides a set of operations to save a frameset
917 (the state of all or a subset of the existing frames and windows, somewhat
918 similar to a frame configuration), both in-session and persistently, and
919 restore it at some point in the future.
921 ** New package filenotify.el provides an interface for file system
922 notifications. It requires that Emacs be compiled with one of the
923 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
925 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
926 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
927 this replaces the string "lambda" with the Greek lambda character.
929 ** New minor mode `superword-mode', which overrides the default word motion
930 commands to treat "symbol_words" as a single word, similar to what
934 * Incompatible Lisp Changes in Emacs 24.4
936 ** The default file coding for Emacs Lisp files is now utf-8.
937 (See `file-coding-system-alist'.) In most cases, this change is
938 transparent, but files that contain unusual characters without
939 specifying an explicit coding system may fail to load with obscure
940 errors. You should either convert them to utf-8 or add an explicit
943 ** Default process filters and sentinels are not nil any more.
944 Instead they default to a function that does what the nil value used to do.
946 ** Overlay priority does not have to be nil or a non-negative integer.
947 Overlay priority can be other kinds of Lisp objects. We didn't yet
948 decide whether other types of values are stable enough, and therefore
949 don't feel it's right to document them. For now, don't assume in your
950 code that the values of overlay priority can only be either nil or an
951 integer, always test them with an appropriate predicate to be one or
952 the other. If you need to sort arbitrary overlays into priority
953 order, `overlays-at' can now optionally do this.
954 You should still only specify integer priorities on overlays you create.
956 ** The cars of the elements in `interpreter-mode-alist' are now
957 treated as regexps rather than literal strings.
959 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
960 It used to disable the minor mode, major mode, and text-property keymaps,
961 whereas now it simply has higher precedence.
963 ** `kill-region' has lost its `yank-handler' optional argument.
965 ** `(input-pending-p)' no longer runs other timers that are ready to run.
966 The new optional CHECK-TIMERS parameter allows for the prior behavior.
968 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
970 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
971 Some languages match those as »...«, and others as «...», so it is
972 better for Emacs to stay neutral by default.
974 ** `read-event' does not always decode chars in ttys any more. As was the case
975 in Emacs 22 and before, `read-event' (and `read-char') by default read raw
976 bytes from the terminal. If you want to read decoded chars instead (as was
977 always the case in Emacs-23, for example), pass a non-nil
978 `inherit-input-method' argument.
980 ** In `symbol-function', nil and "unbound" are indistinguishable.
981 `symbol-function' does not signal a `void-function' error any more.
982 To determine if a symbol's function definition is void, use `fboundp'.
984 ** `defadvice' does not honor the `freeze' flag and cannot advise
985 special-forms any more.
987 ** `dolist' no longer binds VAR while evaluating the RESULT form,
988 when lexical binding is enabled. Previously, VAR was bound to nil,
989 which often led to spurious unused-variable warnings.
991 ** The return value of `backup-buffer' has changed.
992 The second argument is no longer an SELinux context, instead it is an
993 alist of extended attributes as returned by the new function
994 `file-extended-attributes'. The attributes can be applied to another
995 file using `set-file-extended-attributes'.
997 ** By default `copy-file' no longer copies file permission bits to an
998 existing destination; and it sets the file permission bits of a newly
999 created destination to those of the source, masked by the default file
1000 permissions. To copy the file permission bits, pass t as the
1001 PRESERVE-PERMISSIONS argument of `copy-file'.
1003 ** `visited-file-modtime' now returns -1 for nonexistent files.
1004 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1005 in the presence of files with negative time stamps.
1007 ** Frame-local variables that affect redisplay do not work any more.
1008 More specifically, redisplay does not bother to check for a frame-local
1009 value when looking up variables.
1011 ** In compiled Lisp files, the header no longer includes a timestamp.
1013 ** The option `inhibit-local-menu-bar-menus' has been removed.
1016 * Lisp Changes in Emacs 24.4
1018 ** Change to the Emacs Lisp coding conventions: the package descriptor
1019 and name of global variables, constants, and functions should be separated
1020 by two hyphens if the symbol is not meant to be used by other packages.
1022 ** The second argument of `eval' can now specify a lexical environment.
1024 ** New macro `define-alternatives' can be used to define generic commands.
1025 Generic commands are interactive functions whose implementation can be
1026 selected among several alternatives, as a matter of user preference.
1028 ** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1030 ** New functions `special-form-p' and `macrop'.
1032 ** New macro `with-eval-after-load'.
1033 This is like the old `eval-after-load', but better behaved.
1035 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1036 on that symbol will use the associated value as a function to call
1039 ** New variable `enable-dir-local-variables'.
1040 Directory-local variables are ignored if this is nil. This may be
1041 useful for modes that want to ignore directory-locals while still
1042 respecting file-local variables.
1044 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1045 as a function to call to provide default values.
1047 ** New functions `group-gid' and `group-real-gid'.
1049 ** New function `get-pos-property'.
1051 ** New hook `pre-redisplay-function'.
1053 ** `byte-compile-interactive-only-functions' is now obsolete.
1054 To specify that a command should only be called interactively, give it
1055 a non-nil `interactive-only' property.
1057 ** New function `string-suffix-p'.
1059 ** `split-string' now takes an optional argument TRIM.
1060 The value, if non-nil, is a regexp that specifies what to trim from
1061 the start and end of each substring.
1065 *** The separator used by `completing-read-multiple' is now a regexp.
1066 The default `crm-separator' has been changed to allow surrounding spaces
1069 *** New function `completion-table-with-cache' is a wrapper for
1070 `completion-table-dynamic' that caches the result of the last lookup.
1072 *** New function `completion-table-merge' to combine several
1073 completion tables by merging their completions.
1075 *** The `common-substring' argument of `display-completion-list',
1076 which has been documented as obsolete since Emacs 23.1, is now _really_
1077 obsolete, and no longer advertised. Instead either call
1078 `completion-hilit-commonality' to add the highlighting; or use
1079 `completion-all-completions', which returns highlighted strings.
1081 ** Encoding and decoding of text
1083 *** New coding-system `prefer-utf-8'.
1084 This is like `undecided' but prefers UTF-8 on decoding if the text to
1085 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1086 any non-ASCII characters are automatically encoded as UTF-8.
1088 *** New attributes of coding-systems whose type is `undecided'.
1089 Two new attributes, `:inhibit-null-byte-detection' and
1090 `:inhibit-iso-escape-detection', determine how to detect encoding of
1091 text that includes null bytes and ISO-2022 escape sequences, respectively.
1092 Each of these attributes can be either nil, zero, or t. If t, decoding
1093 text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1094 null bytes cause text to be decoded with no-conversion, and ISO-2022
1095 sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1096 encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1097 `inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1098 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1099 UTF-8 encoding and decoding, whenever possible.
1101 These attributes are only meaningful for coding-systems of type `undecided'.
1102 (The type of a coding-system is determined by its `:coding-type' attribute
1103 and can be accessed by calling the `coding-system-type' function.)
1107 *** New function `define-error'.
1109 *** `with-demoted-errors' takes an additional argument `format'.
1113 *** Face specs set via Custom themes now replace the `defface' spec
1114 rather than inheriting from it. In other words, setting a face via a
1115 theme now behaves like setting it via Customize: you only need to
1116 specify the attributes that you want, you don't need to unset those
1117 that you don't want.
1119 *** The function `face-spec-set' is now like `setq' for face specs.
1120 Its third arg now accepts values specifying a face spec type (defface,
1121 custom, or override spec), and the relevant spec is set accordingly.
1123 *** New face spec attribute :distant-foreground
1124 specifies foreground to use if background color is near the foreground
1125 color that would otherwise have been used.
1127 *** New function `add-face-text-property', which can be used to
1128 conveniently prepend/append new face properties.
1130 *** New face characteristic (supports :underline (:style wave))
1131 specifies whether or not the terminal can display a wavy line.
1135 *** Support for filesystem notifications.
1136 Emacs now supports notifications of filesystem changes, such as
1137 creation, modification, and deletion of files. This requires the
1138 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1139 MS-Windows systems, this is supported for Windows XP and newer.
1141 *** The 9th element returned by `file-attributes' is now unspecified.
1142 Formerly, it was t if the file's gid would change if file were deleted
1143 and recreated. This value has been inaccurate for years on many
1144 platforms, and nobody seems to have noticed or cared.
1146 *** The 6th argument to `copy-file' has been renamed to
1147 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1148 Unix file permission bits as well as SELinux context.
1150 *** The function `file-ownership-preserved-p' now has an optional
1151 argument GROUP which causes it check for file group too. This can be
1152 used in place of the 9th element of `file-attributes'.
1154 *** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1155 with the same interpretation as the returned value of `visited-file-modtime'.
1159 *** `image-animated-p' is now `image-multi-frame-p'.
1160 It returns non-nil for any image that contains multiple frames,
1161 whether or not it specifies a frame delay.
1163 *** New variable `image-default-frame-delay' gives the frame delay for
1164 animated images which do not specify a frame delay.
1166 *** New functions `image-current-frame' and `image-show-frame' for getting
1167 and setting the current frame of a multi-frame image.
1171 *** ImageMagick images now support the :max-width and :max-height keywords.
1173 *** When using `create-image' with image data, you can pass a :format
1174 attribute (via the property-list argument) in order to help
1175 ImageMagick detect the image type. The value should be a MIME
1176 content-type that is found in the new variable `image-format-suffixes'.
1178 ** Revert and Autorevert
1180 *** If Emacs is compiled with file notification support, it uses notifications
1181 instead of checking file time stamps. To disable this, set the user option
1182 `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1183 expression matching directories to be excluded from file notifications via
1184 `auto-revert-notify-exclude-dir-regexp'.
1186 *** The default values of `buffer-stale-function', `revert-buffer-function',
1187 and `revert-buffer-insert-file-contents-function' are no longer nil.
1188 Instead they default to functions that do what the nil value used to.
1190 *** `buffer-stale-function' is now used for buffers visiting files too.
1192 *** The new user option `auto-revert-remote-files' enables reversion
1193 of remote files, if non-nil.
1197 *** Functions to pop up menus and dialogs now work on all terminals,
1198 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1199 `message-box', `yes-or-no-p', etc.
1201 The function `display-popup-menus-p' will now return non-nil for a
1202 display or frame whenever a mouse is supported on that display or frame.
1204 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1206 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1207 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1209 ** Minor internal changes to the details of lock files.
1210 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1211 If DIR/.#FILE already exists and is not an Emacs lock file,
1212 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1213 numbered lock files DIR/.#FILE.0...).
1214 On file systems that do not support symbolic links, the lock is now a
1215 regular file with contents being what would have been in the symlink.
1217 ** New bool-vector set operation functions:
1218 *** `bool-vector-exclusive-or'
1219 *** `bool-vector-union'
1220 *** `bool-vector-intersection'
1221 *** `bool-vector-set-difference'
1222 *** `bool-vector-not'
1223 *** `bool-vector-subsetp'
1224 *** `bool-vector-count-consecutive'
1225 *** `bool-vector-count-population'
1227 ** New library subr-x.el with miscellaneous small utility functions:
1228 *** `hash-table-keys'
1229 *** `hash-table-values'
1230 *** `string-blank-p'
1231 *** `string-empty-p'
1233 *** `string-reverse'
1234 *** `string-trim-left'
1235 *** `string-trim-right'
1237 *** `string-remove-prefix'
1238 *** `string-remove-suffix'
1240 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1242 ** The spelling of the rx.el category `chinese-two-byte' has been
1243 corrected (the first 'e' was missing).
1245 ** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1246 *** object-name -> eieio-object-name
1247 *** object-class -> eieio-object-class
1248 *** object-class-fast -> eieio--object-class
1249 *** object-class-name -> eieio-object-class-name
1250 *** object-name-string -> eieio-object-name-string
1251 *** object-num-slots -> eieio--object-num-slots
1252 *** object-set-name-string -> eieio-object-set-name-string
1253 *** class-of -> eieio-object-class
1254 *** class-name -> eieio-class-name
1255 *** class-parent -> eieio-class-parent
1256 *** class-parents -> eieio-class-parents
1257 *** class-parents-fast -> eieio-class-parents-fast
1258 *** class-children -> eieio-class-children
1259 *** class-num-slots -> eieio--class-num-slots
1260 *** class-precedence-list -> eieio-class-precedence-list
1261 *** class-direct-subclasses -> eieio-class-children
1262 *** class-direct-superclasses -> eieio-class-parents
1264 ** Obsoleted functions
1267 *** `lisp-complete-symbol'
1268 *** `field-complete'
1269 *** `minibuffer-completion-contents'
1270 *** `isearch-nonincremental-exit-minibuffer'
1271 *** `isearch-filter-visible'
1272 *** `generic-make-keywords-list'
1273 *** `get-upcase-table' (use `case-table-get-table' instead).
1275 ** `with-wrapper-hook' is obsoleted by `add-function'.
1276 The few hooks that used with-wrapper-hook are replaced as follows:
1277 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1278 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1279 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1282 * Changes in Emacs 24.4 on Non-Free Operating Systems
1284 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1285 To use the old font backend, use the following on the command line:
1286 % defaults write org.gnu.Emacs FontBackend ns
1287 GNUstep and Mac OS X 10.4 use the old font backend.
1289 ** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1290 default fullscreen method is now "native" fullscreen. To use the
1291 old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1293 ** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1294 by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1295 Note that this does not apply to images.
1297 ** The procedure for building Emacs on MS-Windows has changed.
1298 It is now built by running the same configure script as on all other
1299 platforms. This requires the MSYS environment and MinGW development
1300 tools. See the updated instructions in nt/INSTALL for details.
1302 Using the Posix configure script and Makefiles also means a change in
1303 the directory structure of the Emacs installation on Windows. It is
1304 now the same as on GNU and Unix systems. In particular, the auxiliary
1305 programs, such as cmdproxy.exe and hexl.exe, are in
1306 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1307 version), version-independent site-lisp is in share/emacs/site-lisp,
1308 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1309 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1310 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1311 directories and will find the files in there automatically; there's no
1312 need to set any variables due to this change.)
1314 ** Emacs on Windows 2000 and later can now access files and directories
1315 whose names cannot be encoded in the current system codepage.
1317 The new variable `w32-unicode-filenames' controls this feature: if it
1318 is t, Emacs uses Unicode APIs to pass file names to system calls,
1319 which lifts the limitation of file names to the current locale.
1321 ** Lock files now work on MS-Windows.
1322 This helps to prevent losing your edits if the same file is being
1323 edited in another Emacs session or by another user. See the node
1324 "Interlocking" in the Emacs User Manual for the details. To disable
1325 file locking, customize `create-lockfiles' to nil.
1327 ** The "generate a backtrace on fatal error" feature now works on MS-Windows.
1328 The backtrace is written to the 'emacs_backtrace.txt' file in the
1329 directory where Emacs was running.
1331 ** The `network-interface-list' and `network-interface-info' functions
1332 are now available on MS-Windows.
1334 ** The variable `buffer-file-type' is no longer supported.
1335 Setting it has no effect, and %t in the mode-line format is ignored.
1336 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1337 modifying it has no effect.
1340 * Installation Changes in Emacs 24.3
1342 ** The default X toolkit is now Gtk+ version 3.
1343 If you don't pass `--with-x-toolkit' to configure, or if you use
1344 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1345 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1346 You can explicitly require a specific version by passing
1347 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1349 ** New configure option `--enable-link-time-optimization', to utilize
1350 an appropriate feature provided by GCC since version 4.5.0.
1352 ** New configure option `--without-all' to disable most of the optional
1353 features (image support, etc.) that are normally enabled by default.
1355 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1356 Emacs). If building with GCC, this enables compile-time checks that
1357 warn/give errors about possibly-questionable C code. On a recent GNU
1358 system there should be no warnings; on older and on non-GNU systems
1359 the results may be useful to developers.
1361 ** The configure option `--enable-use-lisp-union-type' has been
1362 renamed to `--enable-check-lisp-object-type', as the resulting
1363 Lisp_Object type no longer uses a union to implement the compile time
1364 check that this option enables.
1366 ** The configure option `--disable-maintainer-mode' has been removed,
1367 as it was confusingly-named and rarely useful.
1369 ** The configure options `--program-prefix', `--program-suffix', and
1370 `--program-transform-name' apply to more than just the installed
1371 binaries. Now they also affect the man pages, icons, and the
1372 etc/emacs.desktop file; but not the info pages, since this would break
1373 links between the various manuals.
1375 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1376 overwriting "emacs" in the installation bin/ directory with a link
1379 ** Emacs uses libtinfo in preference to libncurses, if available.
1381 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1382 /usr/pkg/lib to the linker search path. You must add them yourself if
1385 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1386 (from the bin and libexec directories, respectively). The former is
1387 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1390 * Startup Changes in Emacs 24.3
1392 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1393 lisp/ directory. There should not be any there anyway. If you have
1394 been adding them there, put them somewhere else; e.g., site-lisp.
1396 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1399 * Changes in Emacs 24.3
1403 *** `C-h f' (`describe-function') can now perform autoloading.
1404 When this command is called for an autoloaded function whose docstring
1405 contains a key substitution construct, that function's library is
1406 automatically loaded, so that the documentation can be shown
1407 correctly. To disable this, set `help-enable-auto-load' to nil.
1409 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1410 even after their associated libraries have been loaded (and the
1411 autoloads have been redefined as functions).
1415 *** Images displayed via ImageMagick now support transparency and the
1416 :background image specification property.
1418 *** When available, ImageMagick support is automatically enabled.
1419 It is no longer necessary to call `imagemagick-register-types'
1420 explicitly to install ImageMagick image types; that function is called
1421 automatically at startup, or when customizing an imagemagick- option.
1423 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1424 ImageMagick to view images. (You must call `imagemagick-register-types'
1425 afterwards if you do not use customize to change this.)
1427 *** The new variable `imagemagick-enabled-types' also affects which
1428 ImageMagick types are treated as images. The function
1429 `imagemagick-filter-types' returns the list of types that will be
1434 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1435 next and previous path separator, respectively.
1437 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1438 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1439 non-nil before enabling the mode.
1443 *** New option `mode-line-default-help-echo' specifies the help text
1444 (shown in a tooltip or in the echo area) for any part of the mode line
1445 that does not have its own specialized help text.
1447 *** You can now click mouse-3 in the coding system indicator to invoke
1448 `set-buffer-file-coding-system'.
1450 ** Server and client
1452 *** emacsclient now obeys string values for `initial-buffer-choice',
1453 if it is told to open a new frame without specifying any file to visit
1454 or expression to evaluate.
1456 *** New option `server-auth-key' specifies a shared server key.
1458 ** Emacs now generates backtraces on fatal errors.
1459 On encountering a fatal error, Emacs now outputs a textual description
1460 of the fatal signal, and a short backtrace on platforms like glibc
1461 that support backtraces.
1463 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1464 This minor mode replaces `toggle-read-only', which is now obsolete.
1466 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1467 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1468 respectively, without exiting from the prompt.
1470 ** In the Package Menu, newly-available packages are listed as "new",
1471 and sorted above the other "available" packages by default.
1473 ** If your Emacs was built from a repository checkout, the new variable
1474 `emacs-bzr-version' contains information about the bzr revision used.
1476 ** New option `create-lockfiles' specifies usage of lockfiles.
1477 It defaults to t. Changing it to nil inhibits the creation of lock
1478 files (use this with caution).
1480 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1481 variables on remote hosts.
1483 ** The entry for PCL-CVS has been removed from the Tools menu.
1484 The PCL-CVS commands are still available via the keyboard.
1486 ** Using "unibyte: t" in Lisp source files is obsolete.
1487 Use "coding: raw-text" instead.
1489 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1490 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1491 The previous binding, introduced in Emacs 24.1, was a mistake, because
1492 `C-c LETTER' bindings are reserved for user customizations.
1494 ** Internationalization
1496 *** New language environment: Persian.
1498 *** New input method `vietnamese-vni'.
1500 ** Nextstep (GNUstep / Mac OS X) port
1502 *** Support for fullscreen and the frame parameter fullscreen.
1504 *** A file dialog is used for open/save operations initiated from the
1508 * Editing Changes in Emacs 24.3
1510 ** Search and Replace
1512 *** Non-regexp Isearch now performs "lax" space matching.
1513 Each sequence of spaces in the supplied search string may match any
1514 sequence of one or more whitespace characters, as specified by the
1515 variable `search-whitespace-regexp'. (This variable is also used by a
1516 similar existing feature for regexp Isearch.)
1518 *** New Isearch command `M-s SPC' toggles lax space matching.
1519 This applies to both ordinary and regexp Isearch.
1521 *** New option `replace-lax-whitespace'.
1522 If non-nil, `query-replace' uses flexible whitespace matching too.
1525 *** Global `M-s _' starts a symbol (identifier) incremental search,
1526 and `M-s _' in Isearch toggles symbol search mode.
1527 `M-s c' in Isearch toggles search case-sensitivity.
1529 ** Navigation commands
1531 *** New binding `M-g c' for `goto-char'.
1533 *** New binding `M-g TAB' for `move-to-column'.
1535 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1536 interactively with no prefix arg. Previously, it moved to column 1.
1538 ** New option `yank-handled-properties' allows processing of text
1539 properties on yanked text, in ways that are more general than just
1540 removing them (as is done by `yank-excluded-properties').
1542 ** New option `delete-trailing-lines' specifies whether
1543 M-x delete-trailing-whitespace should delete trailing lines at the end
1544 of the buffer. It defaults to t.
1546 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1548 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1549 `ucs-insert' is now an obsolete alias for `insert-char'.
1551 ** The `z' key no longer has a binding in most special modes.
1552 It used to be bound to `kill-this-buffer', but `z' is too easy to
1555 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1556 It copies the region-rectangle as the last rectangle kill.
1560 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1562 *** New option `register-separator' specifies the register containing
1563 the text to put between collected texts for use with
1564 M-x append-to-register and M-x prepend-to-register.
1567 * Changes in Specialized Modes and Packages in Emacs 24.3
1569 ** Common Lisp emulation (CL)
1571 *** CL's main entry is now (require 'cl-lib).
1572 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1573 i.e., all its definitions have the "cl-" prefix (and internal definitions
1574 use the "cl--" prefix).
1576 If `cl' provided a feature under the name `foo', then `cl-lib'
1577 provides it under the name `cl-foo' instead; with the exceptions of the
1578 few `cl' definitions that had to use `foo*' to avoid conflicts with
1579 pre-existing Elisp entities. These have been renamed to `cl-foo'
1580 rather than `cl-foo*'.
1582 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1583 provide the old, non-prefixed names. Some exceptions are listed below:
1585 *** `cl-flet' is not like `flet' (which is deprecated).
1586 Instead it obeys the behavior of Common-Lisp's `flet'.
1587 In particular, in cl-flet function definitions are lexically scoped,
1588 whereas in flet the scoping is dynamic.
1590 *** `cl-labels' is slightly different from `labels'.
1591 The difference is that it relies on the `lexical-binding' machinery
1592 (as opposed to the `lexical-let' machinery used previously) to capture
1593 definitions in closures, so such closures will only work if `lexical-binding'
1596 *** `cl-letf' is not exactly like `letf'.
1597 The only difference is in details that relate to some deprecated usage
1598 of `symbol-function' in place forms.
1600 *** `progv' was rewritten to use the `let' machinery.
1601 A side effect is that variables without corresponding values are bound
1602 to nil rather than being made unbound.
1604 *** The following methods of extending `setf' are obsolete
1605 (use features from gv.el instead):
1606 `define-modify-macro' (use `gv-letplace')
1607 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1608 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1609 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1613 *** Changes are now highlighted using the same color scheme as in
1614 modern VCSes. Deletions are displayed in red (new faces
1615 `diff-refine-removed' and `smerge-refined-removed', and new definition
1616 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1617 and `smerge-refined-added', and new definition of `diff-added').
1619 *** The variable `diff-use-changed-face' defines whether to use the
1620 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1621 changes in context diffs.
1623 *** The new command `diff-delete-trailing-whitespace' removes trailing
1624 whitespace introduced by a diff.
1626 ** Ediff now uses the same color scheme as Diff mode.
1630 A new version of python.el, which provides several new features, including:
1631 per-buffer shells, better indentation, Python 3 support, and improved
1632 shell-interaction compatible with iPython (and virtually any other
1635 *** Some user options have been replaced/renamed, including (old -> new):
1636 **** python-indent -> python-indent-offset
1637 **** python-guess-indent -> python-indent-guess-indent-offset
1638 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1639 **** python-use-skeletons -> python-skeleton-autoinsert
1641 *** Some user options have been removed, including:
1643 **** `python-indent-string-contents': Strings are never indented.
1645 **** `python-honour-comment-indentation':
1646 Comments are always considered as indentation markers.
1648 **** `python-continuation-offset': Indentation is automatically
1649 calculated in a pep8 compliant way depending on the context.
1651 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1652 Have no direct mapping as the shell interaction is completely different.
1654 **** `python-python-command', `python-jython-command':
1655 Replaced by `python-shell-interpreter'.
1657 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1658 `python-pdbtrack-minor-mode-string', `python-source-modes':
1661 *** Some commands have been replaced (old -> new):
1662 **** python-insert-class -> python-skeleton-class
1663 **** python-insert-def -> python-skeleton-def
1664 **** python-insert-for -> python-skeleton-for
1665 **** python-insert-if -> python-skeleton-if
1666 **** python-insert-try/except -> python-skeleton-try
1667 **** python-insert-try/finally -> python-skeleton-try
1668 **** python-insert-while -> python-skeleton-while
1669 **** python-find-function -> python-nav-jump-to-defun
1670 **** python-next-statement -> python-nav-forward-sentence
1671 **** python-previous-statement -> python-nav-backward-sentence
1672 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1673 **** python-end-of-defun-function -> python-nav-end-of-defun
1674 **** python-send-buffer -> python-shell-send-buffer
1675 **** python-send-defun -> python-shell-send-defun
1676 **** python-send-region -> python-shell-send-region
1677 **** python-send-region-and-go -> emulate with python-shell-send-region
1678 and python-shell-switch-to-shell
1679 **** python-send-string -> python-shell-send-string
1680 **** python-switch-to-python -> python-shell-switch-to-shell
1681 **** python-describe-symbol -> python-eldoc-at-point
1685 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1687 *** The D-Bus object manager interface is implemented.
1689 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1690 if their value does not fit into Emacs's integer range.
1692 *** The function `dbus-call-method' is now non-blocking.
1693 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1695 *** Signals can also be sent as unicast messages.
1697 *** The argument list of `dbus-register-signal' has been extended,
1698 according to the new match rule types of D-Bus.
1700 *** `dbus-init-bus' supports private connections.
1702 *** There is a new function `dbus-setenv'.
1704 ** `desktop-path' no longer includes the "." directory.
1705 Desktop files are now located in ~/.emacs.d by default.
1709 *** `dired-do-async-shell-command' executes each file sequentially
1710 if the command ends in `;' (when operating on multiple files).
1711 Otherwise, it executes the command on each file in parallel.
1713 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1714 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1717 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1718 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1719 mark/unmark/flag all files in the active region.
1721 *** The minibuffer default for `=' (`dired-diff') has changed.
1722 It is now the backup file for the file at point, if one exists.
1723 In Transient Mark mode the default is the file at the active mark.
1725 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1726 The global binding for `M-=', `count-words-region' is in effect.
1730 *** New module "notifications", which can send a notification when you
1731 receive a private message or your nickname is mentioned.
1733 *** ERC will look up server/channel names via auth-source and use any
1736 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1737 only applies to messages sent by lurkers.
1739 ** reStructuredText mode
1741 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1742 fontification, comment handling, and customization have all been revised
1745 *** Support for `imenu' and `which-function-mode'.
1747 *** The reStructuredText syntax is more closely covered.
1748 Sphinx support has been improved.
1750 *** `rst-insert-list' inserts new list or continues existing lists.
1752 *** A negative prefix argument always works for `rst-adjust'.
1754 *** The window configuration is reset after displaying a TOC.
1756 *** The constant `rst-version' describes the rst.el package version.
1760 *** Support for percent literals and recognition of regular expressions
1761 in method calls without parentheses with more methods, including Cucumber
1764 *** Improved syntax highlighting and indentation.
1766 *** New command `ruby-toggle-block', bound to `C-c {'.
1768 *** Some non-standard keybindings/commands have been removed:
1770 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1772 **** `ruby-mark-defun'; use `mark-defun'.
1774 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1775 appropriate settings for the variables `beginning-of-defun-function'
1776 and `end-of-defun-function'.
1778 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1779 `reindent-then-newline-and-indent' and `newline' have been removed.
1781 ** Shell Script mode
1783 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1785 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1787 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1791 *** The free software compiler GHDL is supported (and now the default).
1793 *** Support for the VHDL-AMS packages has been added/updated.
1795 *** Updated to the 2002 revision of the VHDL standard.
1797 *** Accepts \r and \f as whitespace.
1801 *** The faces used by Apropos are now directly customizable.
1802 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1803 see the `apropos' Custom group for details.
1805 *** The old options whose values specified faces to use have been removed
1806 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1807 `apropos-match-face' and `apropos-property-face'.).
1811 *** This package has been rewritten to use Tabulated List mode.
1813 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1814 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1818 *** Algebraic simplification mode is now the default.
1819 To restrict to the limited simplifications given by the former
1820 default simplification mode, use `m I'.
1824 *** You can customize the header text that appears above each calendar month.
1825 See the variable `calendar-month-header'.
1827 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1829 *** The calendars produced by cal-html include holidays.
1830 Customize `cal-html-holidays' to change this.
1834 *** The major modes from the parser generators "Bovine" and "Wisent"
1835 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1836 are in `auto-mode-alist', and the corresponding manuals are included.
1840 **** Menu support for the "Configuration" feature. This allows users to
1841 choose the active configuration (such as debug or install) from the menu.
1843 **** New command `ede-set' to interactively set project-local variables.
1845 **** Support for compiling, debugging, and running in "generic" projects.
1847 **** Autoconf editing support for M4 macros with complex arguments.
1849 **** Compilation support for the "linux" project type.
1851 **** "simple" projects have been removed; use "generic" projects instead.
1855 **** Support for parsing #include statements inside a namespace in C/C++.
1857 **** Improved support for 'extern "C"' declarations in C/C++.
1859 **** The ability to ignore more common special C/C++ preprocessor symbols,
1860 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1861 If available, include cdefs.h as an additional source of preprocessor symbols.
1863 **** Improved C/C++ function pointer parsing.
1865 **** In Python, support for converting imports to include file names.
1867 **** Ability to dynamically determine the Python load path.
1869 **** Support for the Python 'WITH' and 'AT' keywords.
1871 **** Improved tooltip completion.
1875 **** The SRecode manual is now included.
1877 **** Tag generation supports constructor/destructor settings and system
1878 include differentiation.
1880 **** Addition of 'Framework' support: Frameworks are specified when a
1881 particular kind of library (such as Android) is needed in a common language
1884 **** Support for nested templates and let variables override based on priority.
1886 **** Support for merging tables from multiple related modes, such as
1887 default -> c++ -> arduino.
1889 ** Compile has a new option `compilation-always-kill'.
1893 *** `custom-reset-button-menu' now defaults to t.
1895 *** Non-option variables are never matched in `customize-apropos' and
1896 `customize-apropos-options' (i.e., the prefix argument does nothing for
1897 these commands now).
1901 *** The variables `term-default-fg-color' and `term-default-bg-color'
1902 are now deprecated in favor of the customizable face `term'.
1904 *** You can customize how to display ANSI terminal colors and styles
1905 by customizing the corresponding `term-color-<COLOR>',
1906 `term-color-underline' and `term-color-bold' faces.
1910 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1912 *** Remote processes are now also supported on remote MS-Windows hosts.
1916 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1917 Previously, this slot stored semicolon-separated attribute-value pairs
1918 appended to some imap URLs, but this is not compatible with RFC 3986.
1919 So now the `filename' slot stores the entire path and query components,
1920 and the `attributes' slot is always nil.
1922 *** New function `url-encode-url' for encoding a URI string.
1923 The `url-retrieve' function now uses this to encode its URL argument,
1924 in case that is not properly encoded.
1926 ** notifications.el supports now version 1.2 of the Notifications API.
1927 The function `notifications-get-capabilities' returns the supported
1930 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1931 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1932 `flymake-warning-bitmap'.
1934 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1935 specifying URL types that should be converted to remote file names at
1936 the FFAP prompt. The default is now '("ftp").
1938 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1939 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1941 ** New option `mouse-avoidance-banish-position' specifies where the
1942 `banish' mouse avoidance setting moves the mouse.
1944 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1945 closing brackets to be aligned with the line of the opening bracket.
1947 ** In Proced mode, new command `proced-renice' renices marked processes.
1949 ** New option `async-shell-command-buffer' specifies the buffer to use
1950 for a new asynchronous `shell-command' when the default output buffer
1951 `*Async Shell Command*' is already in use.
1953 ** SQL mode has a new option `sql-db2-escape-newlines'.
1954 If non-nil, newlines sent to the command interpreter will be escaped
1955 by a backslash. The default does not escape the newlines and assumes
1956 that the sql statement will be terminated by a semicolon.
1958 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1959 (and modes that derive from it), sorts the column at point, or the Nth
1960 column if a numeric prefix argument is given.
1962 ** `which-func-modes' now defaults to t, so Which Function mode, when
1963 enabled, applies to all applicable major modes.
1965 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1968 ** Follow mode no longer works by using advice.
1969 The option `follow-intercept-processes' has been removed.
1971 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1973 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1974 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1975 *** semantic-change-hooks -> semantic-change-functions
1976 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1977 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1978 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1979 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1980 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1981 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1982 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1983 *** rcirc-activity-hooks -> rcirc-activity-functions
1984 *** rcirc-print-hooks -> rcirc-print-functions
1985 *** dbus-event-error-hooks -> dbus-event-error-functions
1986 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1987 *** checkdoc-style-hooks -> checkdoc-style-functions
1988 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1989 *** archive-extract-hooks -> archive-extract-hook
1990 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1991 *** hfy-post-html-hooks -> hfy-post-html-hook
1992 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1993 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1994 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1995 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1997 ** Obsolete packages
2000 In most cases, assoc+member+push+delq work just as well.
2001 And in any case it's just a terrible package: ugly semantics, terrible
2002 inefficiency, and not namespace-clean.
2011 * Incompatible Lisp Changes in Emacs 24.3
2013 ** Docstrings starting with `*' no longer indicate user options.
2014 Only variables defined using `defcustom' are considered user options.
2015 The function `user-variable-p' is now an obsolete alias for
2016 `custom-variable-p'.
2018 ** The return values of `defalias', `defun' and `defmacro' have changed,
2019 and are now undefined. For backwards compatibility, `defun' and
2020 `defmacro' currently return the name of the newly defined
2021 function/macro, but this should not be relied upon.
2023 ** `random' by default now returns a different random sequence in
2024 every Emacs run. Use `(random S)', where S is a string, to set the
2025 random seed to a value based on S, in order to get a repeatable
2026 sequence in later calls.
2028 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2029 that substring is inserted literally even if the LITERAL arg is
2030 non-nil, instead of causing an error to be signaled.
2032 ** `select-window' now always makes the window's buffer current.
2033 It does so even if the window was selected before.
2035 ** The function `x-select-font' can return a font spec, instead of a
2036 font name as a string. Whether it returns a font spec or a font name
2037 depends on the graphical library.
2039 ** `face-spec-set' no longer sets frame-specific attributes when the
2040 third argument is a frame (that usage was obsolete since Emacs 22.2).
2042 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2044 ** The CL package's `get-setf-method' function no longer exists.
2045 Generalized variables are now part of core Emacs Lisp, and implemented
2046 differently to the way cl.el used to do it. It is not possible to
2047 define a compatible replacement for `get-setf-method'. See the file
2048 gv.el for internal details of the new implementation.
2050 ** The arguments of `dbus-register-signal' are no longer just strings,
2051 but keywords or keyword-string pairs. The old argument list will
2052 still be supported for Emacs 24.x.
2054 ** Miscellaneous name changes
2055 Some Lisp symbols have been renamed to correct their spelling,
2056 or to be more consistent with standard Emacs terminology.
2058 *** Renamed functions
2059 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2060 **** inactivate-input-method -> deactivate-input-method
2061 **** quail-inactivate -> quail-deactivate
2062 **** robin-inactivate -> robin-deactivate
2063 **** viper-inactivate-input-method -> viper-deactivate-input-method
2064 **** viper-inactivate-input-method-action ->
2065 viper-deactivate-input-method-action
2066 **** ucs-input-inactivate -> ucs-input-deactivate
2069 The old hooks are still supported for backward compatibility, but they
2070 are deprecated and will be removed eventually.
2071 **** input-method-inactivate-hook -> input-method-deactivate-hook
2072 **** robin-inactivate-hook -> robin-deactivate-hook
2073 **** quail-inactivate-hook -> quail-deactivate-hook
2075 *** Renamed variables
2076 **** follow-deactive-menu -> follow-inactive-menu
2077 **** inactivate-current-input-method-function ->
2078 deactivate-current-input-method-function
2080 ** Some obsolete functions, variables, and faces have been removed:
2081 *** `last-input-char', `last-command-char', `unread-command-char'
2082 *** `facemenu-unlisted-faces'
2083 *** `rmail-decode-mime-charset'
2084 *** `iswitchb-read-buffer'
2085 *** `sc-version', `sc-submit-bug-report'
2086 *** `set-char-table-default'
2087 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2088 *** `compile-internal'
2090 *** `mode-line-inverse-video'
2091 *** `follow-mode-off-hook'
2092 *** `cvs-commit-buffer-require-final-newline'
2093 (use `log-edit-require-final-newline' instead)
2094 *** `cvs-changelog-full-paragraphs'
2095 (use `log-edit-changelog-full-paragraphs' instead)
2096 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2097 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2098 *** `vc-master-templates' (use `vc-handled-backends' instead)
2099 *** `vc-checkout-carefully'
2102 * Lisp Changes in Emacs 24.3
2104 ** CL-style generalized variables are now in core Elisp.
2105 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2106 You can define your own generalized variables using `gv-define-simple-setter',
2107 `gv-define-setter', etc.
2109 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2110 This can significantly speed up execution of non-byte-compiled code,
2111 but can also bump into previously unnoticed cyclic dependencies.
2112 These are generally harmless: they will simply cause the macro calls
2113 to be left for later expansion (as before), but will result in a
2114 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2115 You may wish to restructure your code so this does not happen.
2117 ** New sampling-based Elisp profiler.
2118 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2119 When finished, use M-x profiler-stop. The sampling rate can be based on
2120 CPU time or memory allocations.
2122 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2123 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2125 ** New macros `setq-local' and `defvar-local'.
2127 ** Face underlining can now use a wave.
2129 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2130 of `read-regexp' accepts a string ending with a colon and space, and its
2131 second argument DEFAULTS can be a list of strings accessible via `M-n'
2132 in the minibuffer ahead of other hard-coded useful regexp-related values.
2133 More commands use `read-regexp' now to read their regexp arguments.
2137 *** New function `completion-table-with-quoting' to handle completion
2138 in the presence of quoting, such as file completion in shell buffers.
2140 *** New function `completion-table-subvert' to use an existing completion
2141 table, but with a different prefix.
2145 *** New error type and new function `user-error'.
2146 These do not trigger the debugger.
2148 *** New option `debugger-bury-or-kill', saying what to do with the
2149 debugger buffer when exiting debug.
2151 *** Set `debug-on-message' to enter the debugger when a certain
2152 message is displayed in the echo area. This can be useful when trying
2153 to work out which code is doing something.
2155 *** New var `inhibit-debugger', automatically set to prevent accidental
2156 recursive invocations.
2160 *** New command `fit-frame-to-buffer' adjusts the frame height to
2163 *** The command `fit-window-to-buffer' can adjust the frame height
2164 if the new option `fit-frame-to-buffer' is non-nil.
2166 *** New macro `with-temp-buffer-window', similar to
2167 `with-output-to-temp-buffer'.
2169 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2172 *** New option `switch-to-buffer-preserve-window-point' to restore a
2173 window's point when switching buffers.
2175 *** New display action alist entries `window-height' and `window-width'
2176 specify the size of new windows created by `display-buffer'.
2178 *** New display action alist entry `pop-up-frame-parameters', if
2179 non-nil, specifies frame parameters to give any newly-created frame.
2181 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2182 tells display action functions to avoid changing which frame is
2185 *** New display action alist entry `previous-window', if non-nil,
2186 specifies window to reuse in `display-buffer-in-previous-window'.
2188 *** New display action functions `display-buffer-below-selected',
2189 and `display-buffer-in-previous-window'.
2191 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2192 now accept a third argument to avoid choosing the selected window.
2194 *** Additional values recognized for option `window-combination-limit'.
2196 *** The following variables are obsolete, as they can be replaced by
2197 appropriate entries in the `display-buffer-alist' function introduced
2199 **** `dired-shrink-to-fit'
2200 **** `display-buffer-reuse-frames'
2201 **** `display-buffer-function'
2202 **** `special-display-buffer-names'
2203 **** `special-display-frame-alist'
2204 **** `special-display-function'
2205 **** `special-display-regexps'
2209 *** `current-time-string' no longer requires that its argument's year
2210 must be in the range 1000..9999. It now works with any year supported
2211 by the underlying C implementation.
2213 *** `current-time' now returns extended-format time stamps
2214 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2215 PSEC is typically a multiple of 1000 on current machines. Other
2216 functions that use this format, such as `file-attributes' and
2217 `format-time-string', have been changed accordingly. Old-format time
2218 stamps are still accepted.
2220 *** The format of timers in `timer-list' and `timer-idle-list' is now
2221 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2222 The PSECS slot is new, and uses picosecond resolution. It can be
2223 accessed via the new `timer--psecs' accessor.
2225 *** Last-modified time stamps in undo lists now are of the form
2226 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2230 *** Improved security when handling persistent objects:
2232 **** `eieio-persistent-read' now features optional arguments for specifying
2233 the class to load, as well as a flag stating whether subclasses are allowed;
2234 if provided, other classes will be rejected by the reader. For
2235 compatibility with existing code, if the class is omitted only a
2238 **** New specialized reader for pulling in classes and signaling errors
2239 without evaluation of suspicious code.
2241 **** All slots that contain objects must have a :type. Slots with lists
2242 of objects must use a new type predicate for a list of an object type.
2244 *** Support for `find-function' and similar utilities, through the addition
2245 of filename support to generated symbols.
2247 ** Floating point functions now always return special values like NaN,
2248 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2249 Previously, they returned NaNs on some platforms but signaled errors
2250 on others. The affected functions are acos, asin, tan, exp, expt,
2251 log, log10, sqrt, and mod.
2253 ** New fringe bitmap `exclamation-mark'.
2255 ** Miscellaneous changes to special forms and macros
2257 *** `defun' and `defmacro' are now macros rather than special forms.
2259 *** `kbd' is now a function rather than a macro.
2261 ** Miscellaneous new functions
2263 *** `set-temporary-overlay-map' sets up a temporary keymap that
2264 takes precedence over most other maps for a short while (normally one key).
2266 *** `autoloadp' tests if its argument is an autoloaded object.
2268 *** `autoload-do-load' performs the autoloading operation.
2270 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2272 *** `file-name-base' returns a file name sans directory and extension.
2274 *** `function-get' fetches a function property, following aliases.
2276 *** `posnp' tests if an object is a `posn'.
2278 *** `system-users' returns the user names on the system.
2280 *** `system-groups' returns the group names on the system.
2282 *** `tty-top-frame' returns the topmost frame of a text terminal.
2284 ** The following functions and variables are obsolete:
2285 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2286 *** `buffer-has-markers-at'
2287 *** `macro-declaration-function' (use `macro-declarations-alist')
2288 *** `window-system-version' (provides no useful information)
2289 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2290 *** `query-replace-interactive'
2291 *** `font-list-limit' (has had no effect since Emacs < 23)
2294 * Changes in Emacs 24.3 on Non-Free Operating Systems
2296 ** Cygwin builds can use the native MS Windows user interface.
2297 Pass `--with-w32' to configure. The default remains the X11 interface.
2299 ** Two new functions are available in Cygwin builds:
2300 `cygwin-convert-file-name-from-windows' and
2301 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2302 code to access the Cygwin file-name mapping machinery to convert
2303 between Cygwin and Windows-native file and directory names.
2305 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2306 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2307 `mouse-autoselect-window'.
2309 ** On MS Windows Vista and later Emacs now supports symbolic links.
2311 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2312 support for libxml2, even if its presence is detected.
2314 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2316 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2317 directories to the search path. You must add them yourself if you want them.
2320 * Changes in Emacs 24.2
2322 ** This is mainly a bug-fix release.
2325 * Installation Changes in Emacs 24.1
2327 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2328 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2329 also depend on Gtk+. You can disable them with --without-rsvg and
2332 ** Emacs can be compiled with GnuTLS support.
2333 This happens by default if a suitably recent version of the library is
2334 found at build time. To prevent this, use the configure option
2335 `--without-gnutls'. See below for GnuTLS features.
2337 ** Emacs can be compiled with SELinux support.
2338 This happens by default if a suitably recent version of the library is
2339 found at build time. To prevent this, use the configure option
2340 `--without-selinux'. See below for SELinux features.
2342 ** Emacs can be compiled with ImageMagick support.
2343 This happens by default if a suitably recent version of the library is
2344 found at build time. To prevent this, use the configure option
2345 `--without-imagemagick'. See below for ImageMagick features.
2346 This feature is not available for the Nextstep or MS ports.
2348 ** Emacs can be compiled with libxml2 support.
2349 This happens by default if a suitably recent version of the library is
2350 found at build time. To prevent this, use the configure option
2351 `--without-xml2'. See below for libxml2 features.
2353 ** By default, the installed Info and man pages are compressed.
2354 You can disable this by configuring --without-compress-info.
2356 ** New configure option --with-wide-int.
2357 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2358 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2361 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2362 These provide no new functionality, they just remove the need to edit
2363 lib-src/Makefile by hand in order to use the associated features.
2365 ** New configure option --enable-use-lisp-union-type.
2366 This is only useful for Emacs developers to debug certain types of bugs.
2367 This is not a new feature; only the configure flag is new.
2369 ** The standalone programs digest-doc and sorted-doc are removed.
2370 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2372 ** The standalone program `fakemail' is removed.
2373 If you need it, feedmail.el provides a superset of the functionality.
2376 * Startup Changes in Emacs 24.1
2378 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2379 command line arguments, and the EMACS_UNIBYTE environment variable, no
2380 longer have any effect. (They were declared obsolete in Emacs 23.)
2382 ** New command line option `--no-site-lisp' removes site-lisp directories
2383 from load-path. -Q now implies this. This option does not affect the
2384 EMACSLOADPATH environment variable (and hence has no effect for
2388 * Changes in Emacs 24.1
2392 *** Many packages now use the `completion-at-point' command,
2393 rather than implementing separate completion commands.
2395 *** `completion-at-point' now handles tags and semantic completion.
2397 *** Completion in a non-minibuffer now tries to detect the end of completion
2398 and pops down the *Completions* buffer accordingly.
2400 *** New option `completion-cycle-threshold' allows completion cycling.
2402 *** New option `completion-category-overrides' for overriding the
2403 default completion style in certain circumstances.
2405 *** New completion style `substring'.
2407 *** Completion of buffer names uses `substring' completion by default.
2409 *** The option `widget-complete-field' has been removed.
2413 *** The first time you try sending mail, Emacs asks for a mail method.
2414 This is implemented by a new default for `send-mail-function', which
2415 is `sendmail-query-once'. This offers to use the smtpmail package, or
2416 to use the old defaults relying on external mail facilities
2417 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2418 `mailclient-send-it' on Windows).
2420 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2421 transfers the report to your desktop's preferred mail client, if there
2422 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2425 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2426 and Mail mode changes
2428 ** Emacs server and client changes
2430 *** New option `server-port' specifies the port for TCP Emacs servers.
2432 *** New emacsclient argument -q/--quiet suppresses some status messages.
2434 *** New emacsclient argument --frame-parameters specifies the frame
2435 parameters of any newly-created graphical frame.
2437 *** If emacsclient shuts down due to Emacs signaling an error,
2438 its exit status is 1.
2440 *** New emacsclient argument --parent-id ID.
2441 This opens a client frame in parent X window ID, via XEmbed, similar
2442 to the --parent-id argument to Emacs.
2444 ** Internationalization changes
2446 *** Emacs now supports display and editing of bidirectional text.
2447 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2448 displayed in the correct visual order as expected by users of those
2449 scripts. The display reordering is a "full bidirectionality" class
2450 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2451 with no RTL text should look exactly the same as before.
2453 **** New buffer-local variable `bidi-display-reordering'.
2454 To disable display reordering in a buffer, change this to nil.
2456 **** New buffer-local variable `bidi-paragraph-direction'.
2457 If nil (the default), Emacs determines the base direction of each
2458 paragraph from its text, as specified by the UBA. Setting the value
2459 to `right-to-left' or `left-to-right' forces a base direction on each
2462 Paragraphs with right-to-left base direction are displayed starting at
2463 the right window edge.
2465 *** Enhanced support for characters with no glyphs in available fonts,
2466 or, on text terminals, characters that cannot be encoded by the
2467 terminal coding system. The new option `glyphless-char-display-control'
2468 specifies how to display them: as a hexadecimal code in a box, a thin
2469 1-pixel space, an empty box, etc.
2471 *** New input methods for Farsi and Bulgarian
2472 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2474 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2475 (U+2010 and U+2011).
2477 *** New Hebrew translation of the Emacs Tutorial.
2478 Type `C-u C-h t' to choose it in case your language setup doesn't
2479 automatically select it.
2481 ** An Emacs Lisp package manager is now included.
2482 This is a convenient way to download and install additional packages,
2483 from a package repository at http://elpa.gnu.org.
2485 *** M-x list-packages shows a list of packages, which can be
2486 selected for installation.
2488 *** New command `describe-package', bound to `C-h P'.
2490 *** By default, all installed packages are loaded automatically when
2491 Emacs starts up. To disable this, set `package-enable-at-startup' to
2492 nil. To specify the packages to load, customize `package-load-list'.
2494 ** Custom theme changes
2496 *** New command `M-x customize-themes', which provides a convenient
2497 interface for enabling and disabling Custom themes.
2499 *** New option `custom-theme-load-path' is the load path for themes.
2500 Emacs no longer looks for Custom themes in `load-path'. The default
2501 value of `custom-theme-load-path' says to look for themes in
2502 `custom-theme-directory', followed by a subdirectory of
2503 `data-directory' named "themes/", which contains a small selection of
2504 built-in Custom themes.
2506 *** New option `custom-safe-themes' records known-safe theme files.
2507 If a theme is not in this list, Emacs queries before loading it, and
2508 offers to save the theme to `custom-safe-themes' automatically. By
2509 default, all themes included in Emacs are treated as safe.
2511 ** Improved GTK integration
2513 *** GTK scroll-bars are now placed on the right by default.
2514 The function `set-scroll-bar-mode' can change this.
2516 *** GTK tool bars can have just text, just images or images and text.
2517 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2518 the default is taken from desktop settings.
2520 *** GTK tool bars can be placed on any edge of the frame.
2521 The frame-parameter tool-bar-position controls this. It takes the
2522 values top, left, right or bottom. The Options => Show/Hide menu has
2525 *** The default colors for selected text (the `region' face) are taken
2526 from the GTK theme when Emacs is built with GTK.
2528 *** Emacs uses GTK tooltips by default if built with GTK.
2529 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2531 ** Graphical interface changes
2533 *** On graphical displays, the mode-line no longer ends in dashes.
2534 Also, the first dash (which does not indicate anything) is just
2535 displayed as a space.
2537 *** `menu-bar-select-buffer-function' lets you choose another operation
2538 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2540 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2541 built with Xft. These fonts can be set via X resources, for example:
2542 Emacs.pane.menubar.font: Courier-12
2546 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2547 or if it receives a SIGINT signal in batch mode.
2549 *** `kill-emacs-hook' is now also run in batch mode.
2550 Third-party code which adds to `kill-emacs-hook' should check if they
2551 do the right thing in batch mode.
2553 ** Scrolling changes
2555 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2556 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2557 of buffer at first key-press (instead they move to top/bottom of buffer)
2558 when `scroll-error-top-bottom' is non-nil.
2560 *** New option `scroll-error-top-bottom' (see above).
2562 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2563 scroll a line instead of full screen.
2565 *** New property `scroll-command' should be set on a command's symbol to
2566 define it as a scroll command affected by `scroll-preserve-screen-position'.
2568 *** If you customize `scroll-conservatively' to a value greater than 100,
2569 Emacs will never recenter point in the window when it scrolls due to
2570 cursor motion commands or commands that move point (e.f., `M-g M-g').
2571 Previously, you needed to use `most-positive-fixnum' as the value of
2572 `scroll-conservatively' to achieve the same effect.
2574 *** "Aggressive" scrolling now honors the scroll margins.
2575 If you customize `scroll-up-aggressively' or
2576 `scroll-down-aggressively' and move point off the window, Emacs now
2577 scrolls the window so as to avoid positioning point inside the scroll
2580 ** Basic SELinux support has been added.
2581 This requires Emacs to be linked with libselinux at build time.
2583 *** Emacs preserves the SELinux file context when backing up.
2584 Also, the function `copy-file' has an extra optional argument for
2585 preserving SELinux context, and the return value of `backup-buffer'
2586 now includes the SELinux context.
2588 *** New functions `file-selinux-context' and `set-file-selinux-context'
2589 get and set the SELinux context of a file.
2593 *** `delete-by-moving-to-trash' now only affects commands that specify
2594 trashing. This avoids inadvertently trashing temporary files.
2596 *** Calling `delete-file' or `delete-directory' with a prefix argument
2597 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2599 ** File- and directory-local variable changes
2601 *** You can stop directory local vars from applying to subdirectories.
2602 Add an element (subdirs . nil) to the alist portion of any variables
2603 settings to indicate that the section should not apply to
2606 *** Directory local variables can apply to some file-less buffers.
2607 Affected modes include dired, vc-dir, and log-edit. For example,
2608 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2609 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2610 `hack-dir-local-variables-non-file-buffer' to support this.
2612 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2613 Instead, use "eval: (minor-mode 1)".
2615 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2616 to `inhibit-local-variables-regexps'. As the name suggests, it now
2617 applies to ALL file local variables, not just -*- lines. The
2618 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2623 *** The `quit-window' command now restores the last buffer displayed
2624 in the quitted window.
2626 *** Resizing an Emacs frame now preserves proportional window sizes,
2627 modulo restrictions like window minimum sizes and fixed-size windows.
2629 *** The behavior of `display-buffer' is now customizable in detail.
2631 **** New option `display-buffer-base-action' specifies a list of
2632 user-determined display "actions" (functions and optional arguments
2633 for choosing the displaying window).
2635 This takes precedence over the default display action, which is
2636 specified by `display-buffer-fallback-action'.
2638 **** New option `display-buffer-alist' maps buffer name regexps to
2639 display actions, taking precedence over `display-buffer-base-action'.
2641 *** New option `window-combination-limit'.
2642 The new option `window-combination-limit' allows to return the space
2643 obtained for resizing or creating a window more reliably to the window
2644 from which such space was obtained.
2646 *** New option `window-combination-resize'.
2647 The new option `window-combination-resize' allows to split a window that
2648 otherwise cannot be split because it's too small by stealing space from
2649 other windows in the same combination. Subsequent resizing or deletion
2650 of the window will resize all windows in the same combination as well.
2652 *** New option `frame-auto-hide-function' lets you choose between
2653 iconifying or deleting a frame when burying a buffer in a dedicated
2654 frame, or quitting a window showing a buffer in a frame of its own.
2656 *** New commands `maximize-window' and `minimize-window'.
2657 These maximize and minimize the size of a window within its frame.
2659 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2660 These functions allow to navigate through the live buffers that have
2661 been shown in a specific window.
2663 ** Minibuffer changes
2665 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2666 This is handy for minibuffer-only frames, and is also used for the feature
2667 where mouse-1 pops up *Messages*"', which can now easily be changed.
2669 *** Minibuffers set `truncate-lines' to nil.
2670 If you want to change the value to something else, you could use
2671 for example `minibuffer-setup-hook'.
2673 ** `auto-mode-case-fold' is now enabled by default.
2675 ** `backup-by-copying-when-mismatch' now defaults to t.
2677 ** New basic faces `error', `warning', `success'.
2678 These are used to highlight text indicating failure, caution or
2679 successful operation.
2681 ** New option `list-colors-sort' defines the color sort order
2682 for `list-colors-display'.
2684 ** The variable `focus-follows-mouse' now always defaults to nil.
2687 * Editing Changes in Emacs 24.1
2691 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2692 `isearch-yank-line'.
2694 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2695 `isearch-yank-kill'.
2697 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2699 ** New commands `count-words-region' and `count-words'.
2701 *** M-= is bound to `count-words-region', not `count-lines-region'.
2702 The `count-words-region' command, when called interactively, reports
2703 the number of lines, words, and characters in the region. It is a
2704 superset of the old `count-lines-region', which is now an obsolete
2707 ** The command `just-one-space' (M-SPC), if given a negative argument,
2708 also deletes newlines around point.
2712 *** New option `delete-active-region'.
2713 If non-nil, [delete] and DEL delete the region if it is active and no
2714 prefix argument is given. If set to `kill', those commands kill
2717 *** New command `delete-forward-char', bound to [delete].
2718 This is meant for interactive use, and obeys `delete-active-region'.
2719 The command `delete-char' does not obey `delete-active-region'.
2721 *** `delete-backward-char' is now a Lisp function.
2722 Apart from obeying `delete-active-region', its behavior is unchanged.
2723 However, the byte compiler now warns if it is called from Lisp; Lisp
2724 callers should use delete-char with a negative argument instead.
2726 *** The option `mouse-region-delete-keys' has been deleted.
2728 ** Selection changes.
2730 The default handling of clipboard and primary selections has been
2731 changed to conform with modern X applications. In short, most
2732 commands for killing and yanking text now use the clipboard, while
2733 mouse commands use the primary selection.
2735 In the following, we provide a list of these changes, followed by a
2736 list of steps to get the old behavior back if you prefer that.
2738 *** `select-active-regions' now defaults to t.
2739 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2740 the kill ring. The selected text is put in the primary selection, if
2741 the system possesses a separate primary selection facility (e.g. X).
2743 **** `select-active-regions' also accepts a new value, `only'.
2744 This means to only set the primary selection for temporarily active
2745 regions (usually made by mouse-dragging or shift-selection);
2746 "ordinary" active regions, such as those made with C-SPC followed by
2747 point motion, do not alter the primary selection.
2749 **** `mouse-drag-copy-region' now defaults to nil.
2751 *** mouse-2 is now bound to `mouse-yank-primary'.
2752 This pastes from the primary selection, ignoring the kill-ring.
2753 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2755 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2757 *** `x-select-enable-primary' now defaults to nil.
2758 Thus, commands that kill text or copy it to the kill-ring (such as
2759 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2761 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2762 exactly equivalent to M-w, C-w, and C-y respectively.
2764 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2765 non-nil by default, as Windows does not support the primary selection
2766 between applications.
2768 *** To return to the previous behavior, do the following:
2770 **** Change `select-active-regions' to nil.
2771 **** Change `mouse-drag-copy-region' to t.
2772 **** Change `x-select-enable-primary' to t (on X only).
2773 **** Change `x-select-enable-clipboard' to nil.
2774 **** Bind `mouse-yank-at-click' to mouse-2.
2776 *** Support for X cut buffers has been removed.
2778 *** X clipboard managers are now supported.
2779 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2781 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2782 in the current rectangle. With a prefix argument, this prompts for a
2783 number to count from and for a format string.
2785 ** `redisplay-dont-pause' now defaults to t.
2786 This makes Emacs feel more responsive to editing commands that arrive
2787 at high rate, e.g. if you lean on some key, because stopping redisplay
2788 in the middle (when this variable is nil) forces more expensive
2789 updates later on, and Emacs appears to be unable to keep up.
2791 ** The behavior of <TAB> for active regions in Text mode has changed.
2792 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2793 when the region is active causes Emacs to indent all the lines in the
2794 region, aligning them with the line previous to the first line in the
2795 region (or with the left margin if there is no previous line).
2797 ** When `occur' is called with a prefix argument, matching strings are
2798 collected into the `*Occur*' buffer without line numbers. If there
2799 are parenthesized subexpressions in the specified regexp, `occur'
2800 reads replacement text that may contain \\& and \\N whose convention
2801 follows `replace-match'.
2804 * Changes in Specialized Modes and Packages in Emacs 24.1
2806 ** Archive Mode has basic support for browsing and updating 7z archives.
2810 *** BibTeX mode now supports biblatex.
2811 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2812 `bibtex-entry-field-alist' is now an obsolete alias for
2813 `bibtex-BibTeX-entry-alist'.
2815 *** New command `bibtex-search-entries', bound to C-c C-a.
2817 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2819 *** New variable `bibtex-search-entry-globally'.
2823 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2825 *** The default browser used by the package is now the "xdg-open" program,
2826 on platforms that support it. This calls your desktop's preferred browser.
2830 *** Support for musical notes.
2832 *** Support for logarithmic units.
2834 *** No longer uses the tex prefix for TeX specific unit names when
2835 using TeX or LaTeX mode.
2837 *** New option to highlight selections using faces.
2839 *** `calc-histogram' has the option of using a vector to determine the bins.
2841 *** New "O" option prefix.
2843 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2845 ** Calendar, Diary, and Appt
2847 *** Diary entries can contain non-printing "comments".
2848 See the variable `diary-comment-start'.
2850 *** Appointments can specify their individual warning times.
2851 See the variable `appt-warning-time-regexp'.
2853 *** The function specified by `appt-disp-window-function' may be passed
2854 lists of arguments if multiple appointments are due at similar times.
2855 If you are using a custom function for this, you should update it.
2857 *** New function `diary-hebrew-birthday'.
2859 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2860 may no longer be nil, but must all be strings.
2862 *** The obsolete (since Emacs 22.1) method of enabling the appt
2863 package by adding `appt-make-list' to `diary-hook' has been removed.
2864 Use `appt-activate' instead.
2866 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2867 appt-issue-message (use the function appt-activate)
2868 appt-visible/appt-msg-window (use the variable appt-display-format)
2870 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2871 view-diary-entries, list-diary-entries, show-all-diary-entries
2875 *** New feature to "guess" the style in an existing buffer.
2876 The main entry point is M-x c-guess.
2878 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2880 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2881 Thus C-M-a will, by default, go to the beginning of the immediate function,
2884 *** "Macros with semicolons" can be registered for correct indentation.
2885 Where such a macro ends a line (no semicolon) the next statement is no longer
2886 parsed as a statement continuation.
2888 ** Comint and modes derived from it use the standard completion code.
2892 *** Compilation mode can be used without Font Lock mode.
2893 `compilation-parse-errors-function' is now obsolete.
2895 *** New variable `compilation-filter-start', which is bound while
2896 `compilation-filter-hook' runs. It records the start position of the
2897 text inserted by `compilation-filter'.
2899 *** `compilation-error-screen-columns' and `compilation-first-column'
2900 are obeyed in the editing buffer. So programming language modes can
2901 set them, whereas previously only the value in the *Compilation*
2906 *** Customize buffers now contain a search field.
2907 The search is performed using `customize-apropos'.
2908 To turn off the search field, set `custom-search-field' to nil.
2910 *** Options in customize group buffers start out hidden if not customized.
2911 Use the arrow to the left of the option name to toggle visibility.
2913 *** custom-buffer-sort-alphabetically now defaults to t.
2915 *** The color widget now has a "Choose" button, which allows you to
2916 choose a color via `list-colors-display'.
2920 *** It is now possible to access buses other than the default system
2923 *** The `dbus-register-method' and `dbus-register-property' functions
2924 optionally do not register names.
2926 *** The new function `dbus-register-service' registers a known service
2927 name on a D-Bus without also registering a property or a method.
2931 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2932 if called with a prefix argument, read a file name from the minibuffer
2933 instead of using the current buffer.
2935 *** The "dired local variables" feature of Dired-x is obsolete.
2936 The standard directory local variables feature replaces it.
2940 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2941 controlling attempts to autojoin a channel.
2943 *** New variable `erc-coding-system-precedence': If we use `undecided'
2944 as the server coding system, this variable will then be consulted.
2945 The default is to decode strings that can be decoded as utf-8 as
2946 utf-8, and do the normal `undecided' decoding for the rest.
2950 *** The default value of `eshell-directory-name' has changed
2951 to be an "eshell" directory in `user-emacs-directory'.
2952 The old "~/.eshell/" directory is still used if it exists, though.
2956 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2957 It now supports multithread non-stop debugging and simultaneous
2958 debugging of several threads.
2962 *** RET (`image-toggle-animation') toggles animation, if applicable.
2963 Animation plays once, unless the option `image-animate-loop' is non-nil.
2967 *** New command M-x info-display-manual displays a named Info manual.
2968 If that manual is already visited in some Info buffer, it displays
2969 that buffer. (This is handy if you have many manuals in many *info*
2970 buffers, and don't remember the name of the buffer visiting the manual
2971 you want to consult.) Otherwise, it loads and displays the manual.
2973 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2974 This is for compatibility with the stand-alone Info reader program,
2975 and also because `Info-edit' is a rarely used command that is disabled
2978 ** Mail mode changes (not Message mode)
2980 *** New command M-x mail-add-attachment for adding MIME attachments
2982 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2983 (Its name is misleading, since it has nothing to do with MIME
2984 attachments.) The old name is now an obsolete alias to the new name.
2986 ** MH-E has been updated to MH-E version 8.3.1.
2987 See MH-E-NEWS for details.
2989 ** Modula-2 mode provides auto-indentation.
2991 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2993 ** nXML mode no longer binds C-RET to `nxml-complete'.
2994 Completion is now performed via `completion-at-point', bound to C-M-i
2995 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2996 default), this performs tag completion.
2998 ** Org mode has been updated to version 7.8.09.
2999 See ORG-NEWS for details.
3001 ** Prolog mode has been completely revamped, with lots of additional
3002 functionality such as more intelligent indentation, electricity,
3003 support for more variants, including Mercury, and a lot more.
3007 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3008 in the Rmail incoming message.
3010 *** The variable `rmail-message-filter' no longer has any effect.
3011 This change was made in Emacs 23.1 but was not advertised at the time.
3012 Try using `rmail-show-message-hook' instead.
3016 *** M-x shell prompts for the shell path name if the default directory
3017 is a remote file name and neither the environment variable $ESHELL nor
3018 the variable `explicit-shell-file-name' is set.
3020 *** TAB is now bound to the standard `completion-at-point' command,
3021 which now implements the pcomplete rules for shell command completion.
3025 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3026 if the mail server supports them. This uses either built-in GnuTLS
3027 support, or the starttls.el library. Customize `smtpmail-stream-type'
3030 *** The variable `smtpmail-auth-credentials' has been removed.
3031 By default, the information is now stored in the file ~/.authinfo.
3032 This was the default value of smtpmail-auth-credentials. If you had
3033 customized smtpmail-auth-credentials to a list of user names and
3034 passwords, those settings are not used. During your first connection
3035 to the smtp server, Emacs will prompt for the user name and password,
3036 and offer to save them to ~/.authinfo. Or you can manually copy the
3037 credentials to ~/.authinfo. For example, if you had
3039 (setq smtpmail-auth-credentials
3040 '(("mail.example.org" 25 "jim" "s!cret")))
3042 then the equivalent line in ~/.authinfo would be
3044 machine mail.example.org port 25 login jim password s!cret
3046 See the auth-source manual for more information, e.g. on encrypting
3047 the credentials file.
3049 *** The variable `smtpmail-starttls-credentials' has been removed.
3050 If you had that set, you need to put
3052 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3054 in your ~/.authinfo file instead.
3056 *** SMTPmail defaults to using the address in the From: header as the
3057 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3058 to the address you wish to use instead.
3062 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3063 and `sql-oracle-scan-on'.
3065 *** New options controlling prompting for login parameters.
3066 Each supported product has a custom variable `sql-*-login-params',
3067 which is a list of the parameters to be prompted for before a
3068 connection is established.
3070 *** The command `sql-product-interactive' now takes a prefix argument,
3071 which causes it to prompt for an SQL product.
3073 *** Product-specific SQL interactive commands now take prefix arguments.
3074 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3075 given a prefix argument, prompt for a name for the SQL interactive
3076 buffer. This reduces the need for calling `sql-rename-buffer'.
3078 *** SQL interactive modes suppress command continuation prompts, and
3079 replace tabs with spaces. The first change impacts multiple line SQL
3080 statements entered with C-j between each line, statements yanked into
3081 the buffer and statements sent with `sql-send-*' functions. The
3082 second prevents the MySQL and Postgres interpreters from listing
3083 object name completions when sent text via `sql-send-*' functions.
3085 *** New command `sql-connect' starts a predefined SQLi session,
3086 using the login parameters from `sql-connection-alist'.
3088 *** New "Save Connection" menu item in SQLi buffers.
3089 This gathers the login params specified for the SQLi session, if it
3090 was not started by a connection, and saves them as a new connection.
3092 *** New commands for listing database objects and details:
3093 sql-list-all and sql-list-table.
3095 *** An API for manipulating SQL product definitions has been added.
3099 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3103 *** New inline access method "ksu" (kerberized su).
3105 *** The following access methods are discontinued: "ssh1_old",
3106 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3108 *** The user option `remote-file-name-inhibit-cache' controls whether
3109 remote file attributes are cached for better performance.
3111 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3112 default value to "".
3114 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3115 for remote machines which support SELinux.
3117 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3118 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3119 the degree of parallelism.
3121 ** VC and related modes
3123 *** Support for pulling on distributed version control systems.
3124 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3125 supported (currently with Bzr, Git, and Mercurial), to update the
3126 current branch and working tree. A prefix argument means to prompt
3127 the user for specifics, e.g. a pull location.
3129 *** `vc-update' is now an alias for `vc-pull'.
3131 *** Support for merging on distributed version control systems.
3132 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3133 is supported (currently with Bzr, Git, and Mercurial), to merge
3134 changes from another branch into the current one. It prompts for
3135 specifics, e.g. a merge source.
3137 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3138 shows a diff while querying the user. It defaults to t.
3140 *** Log entries in some Log View buffers can be toggled to display a
3141 longer description by typing RET (log-view-toggle-entry-display).
3142 This is currently supported for Bzr, Git, and Mercurial (to support
3143 another backend, define a `log-view-expanded-log-entry-function').
3144 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3145 use this to display the full log entry for the revision at point.
3147 *** New command `vc-ediff' allows visual comparison of two revisions
3148 of a file similar to `vc-diff', but using ediff backend.
3150 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3151 this was not advertised at the time.
3153 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3154 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3155 this was not advertised at the time.
3161 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3163 *** partial-completion-mode (complete.el) is obsolete.
3164 You can get a comparable behavior with:
3165 (setq completion-styles '(partial-completion initials))
3166 (setq completion-pcm-complete-word-inserts-delimiters t)
3168 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3170 *** pgg is obsolete (use EasyPG instead).
3172 *** sregex.el is obsolete, since rx.el is a strict superset.
3174 *** s-region.el and pc-select.el are obsolete.
3175 They are superseded by shift-select-mode, enabled by default since 23.1.
3177 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3181 *** The Landmark game is now invoked with `landmark', not `lm'.
3182 Its functions and variables have been similarly renamed.
3184 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3185 (This interfered with cua-mode.)
3187 *** f90.el has some support for Fortran 2008 syntax.
3189 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3191 *** New command `nato-region' converts text to NATO phonetic alphabet.
3194 * New Modes and Packages in Emacs 24.1
3196 ** Occur Edit mode applies edits made in *Occur* buffers to the
3197 original buffers. It is bound to "e" in Occur mode.
3199 ** New global minor mode electric-pair-mode.
3200 When enabled, typing an open parenthesis automatically inserts the
3201 matching closing one.
3203 ** New global minor mode electric-indent-mode.
3204 When enabled, typing certain characters triggers reindentation.
3205 Major modes wishing to use this can set electric-indent-chars or
3206 electric-indent-functions.
3208 ** New global minor mode electric-layout-mode.
3209 When enabled, typing certain characters automatically inserts newlines.
3210 Major modes wishing to use this can set electric-layout-rules.
3212 ** tabulated-list.el provides a generic major mode for tabulated data,
3213 from which other modes can be derived.
3215 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3217 ** secrets.el is an implementation of the Secret Service API, an
3218 interface to password managers like GNOME Keyring or KDE Wallet. The
3219 Secret Service API requires D-Bus for communication. The command
3220 `secrets-show-secrets' offers a buffer with a visualization of the
3223 ** notifications.el provides an implementation of the Desktop
3224 Notifications API. It requires D-Bus for communication.
3226 ** soap-client.el supports access to SOAP web services from Emacs.
3227 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3229 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3231 ** New emacs-lock.el package.
3232 The previous version has been moved to obsolete/old-emacs-lock.el.
3233 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3234 against exiting Emacs and killing the buffer can be set separately.
3235 The mechanism for automatically turning off protection for buffers
3236 with dead inferior processes has been generalized.
3239 * Incompatible Lisp Changes in Emacs 24.1
3241 ** Passing a nil argument to a minor mode function call now ENABLES
3242 the minor mode unconditionally. This is so that you can write e.g.
3244 (add-hook 'text-mode-hook 'foo-mode)
3246 to enable foo-mode in Text mode buffers, removing the need for
3247 `turn-on-foo-mode' style functions. This affects all mode commands
3248 defined by `define-minor-mode'. If called interactively, the mode
3249 command still toggles the minor mode.
3251 ** The return value of `backup-buffer' has changed.
3252 It is now a list of three elements, where the second element is a list
3253 describing the original file's SELinux context. If Emacs or the
3254 system lacks SELinux support, the context list is (nil nil nil nil).
3255 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3257 ** `char-direction-table' and the `char-direction' function were deleted.
3258 They were buggy and inferior to the new support of bidirectional
3259 editing introduced in Emacs 24. If you need the bidirectional
3260 properties of a character, use `get-char-code-property' with the last
3261 argument `bidi-class'.
3263 ** `copy-directory' now copies the source directory as a subdirectory
3264 of the target directory, if the latter is an existing directory. The
3265 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3266 the contents directly into a pre-existing target directory.
3268 ** For mouse click input events in the text area, the Y pixel
3269 coordinate in the POSITION list now counts from the top of the text
3270 area, excluding any header line. Previously, it counted from the top
3273 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3274 been further reduced. Now a backquote not followed by a space is
3275 always treated as a "new-style" backquote. Please remove all
3276 "old-style" backquotes from your code. If your code uses backquotes
3277 as documented in the Elisp manual, and compiles without warning, then
3278 you have nothing to do in this regard. Code not following the
3279 appropriate conventions may fail to compile.
3281 The most common cause of trouble seems to be an old-style backquote
3282 followed by a newline. Another cause of trouble is vector notation
3283 for key sequence notation: instead of [(control ,)] and [(control ')],
3284 you should write [(control ?,)] and [(control ?')], which will work in
3287 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3288 was not advertised at the time. The function `custom-initialize-delay'
3289 replaced all known uses.
3291 ** `view-buffer' now treats special mode-class in the same way that
3292 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3293 major mode is special).
3295 ** Menu and tool bar changes
3297 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3298 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3299 With these alist entries omitted, `make-frame' checks the value of the
3300 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3301 a menu-bar or tool-bar, respectively. If the alist entries are added,
3302 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3304 *** The menu bar bindings's caches are not used any more.
3305 Use (where-is-internal <def> nil t) instead.
3307 ** Regions created by mouse dragging are now normal active regions,
3308 similar to those created by shift-selection (see Selection changes
3309 above). In previous Emacs versions, these regions were delineated by
3310 `mouse-drag-overlay'; that variable has been removed.
3312 ** The fourth argument of `filter-buffer-substring' has been removed.
3313 If you want to remove text properties from the final result, simply
3314 pass the result through substring-no-properties.
3316 ** cl.el no longer provides `cl-19'.
3318 ** The following obsolete functions and aliases have been removed
3319 (the appropriate new function is given in parentheses; "not needed"
3320 means you can just remove all calls to the function in question):
3322 *** `comint-kill-output' (`comint-delete-output')
3323 *** `decompose-composite-char' (`char-to-string')
3324 *** `outline-visible' (`outline-invisible-p')
3325 *** `internal-find-face' (`facep')
3326 *** `internal-get-face' (`facep and check-face')
3327 *** `frame-update-faces' (not needed)
3328 *** `frame-update-face-colors' (`frame-set-background-mode')
3329 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3330 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3331 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3332 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3333 *** `x-make-font-unbold' (`make-face-unbold')
3334 *** `x-make-font-unitalic' (`make-face-unitalic')
3335 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3336 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3337 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3338 *** `char-bytes' (== 1)
3339 *** `isearch-return-char' (`isearch-printing-char')
3340 *** `make-local-hook' (not needed)
3341 *** `set-screen-height' (`set-frame-height')
3342 *** `set-screen-width' (`set-frame-width')
3344 ** The following obsolete variables and varaliases have been removed
3345 (the appropriate new variable is given in parentheses):
3347 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3348 *** `vc-header-alist' (`vc-BACKEND-header')
3349 *** `directory-sep-char' (== ?/)
3350 *** `font-lock-defaults-alist' (`font-lock-defaults')
3351 *** `e' (`float-e').
3353 ** The following obsolete files were removed:
3354 sc.el, x-menu.el, rnews.el, rnewspost.el
3356 ** The format of the finder-inf.el file has changed, since the Finder
3357 mechanism is now based on the package system. The variable
3358 `finder-package-info' is replaced by `package--builtins' and
3359 `finder-keywords-hash'.
3361 ** When generating autoloads, `update-directory-autoloads' no longer
3362 assumes every inspected file is in your `load-path'. It instead
3363 generates relative names according to the current `load-path'.
3366 * Lisp Changes in Emacs 24.1
3368 ** Code can now use lexical scoping by default instead of dynamic scoping.
3369 The `lexical-binding' variable enables lexical scoping for local
3370 variables. It is typically set via a file-local variable in the first
3371 line of the file, in which case it applies to all the code in that
3374 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3375 binding instead of the old dynamic binding mode.
3377 *** Lexically scoped interpreted functions are represented with a new form
3378 of function value which looks like (closure ENV ARGS &rest BODY).
3380 *** New macro `letrec' to define recursive local functions.
3382 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3383 So do `defcustom' and other forms that call `defvar' as a subroutine.
3385 *** New function `special-variable-p' to check whether a variable is
3386 declared as dynamically bound.
3388 *** The form ((lambda ...) ...) is deprecated.
3390 ** An Emacs Lisp testing tool is now included.
3391 Emacs Lisp developers can use this tool to write automated tests for
3392 their code. See the ERT info manual for details.
3394 ** Changes for bidirectional display and editing
3396 *** New function `current-bidi-paragraph-direction'.
3397 This returns the base direction of the paragraph at point.
3399 *** New function `bidi-string-mark-left-to-right'.
3400 Given a string containing characters from right-to-left scripts, this
3401 function returns another string which can be safely inserted into a
3402 buffer, such that any following text will be always displayed to the
3403 right of that string. (This works by appending an invisible Unicode
3404 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3406 This is useful when the buffer has overall left-to-right paragraph
3407 direction and you need to insert a string whose contents are not known
3408 in advance, without disrupting the layout of the line.
3412 *** Window tree functions are accessible in Elisp.
3413 Functions are provided to return the parent, siblings or child windows
3414 of any window including internal windows (windows not associated with a
3415 buffer) in the window tree.
3417 **** New function `window-valid-p' gives non-nil for live and internal
3420 **** Window manipulation can deal with internal windows.
3421 Many window handling functions like `split-window', `delete-window', or
3422 `delete-other-windows' as well as the window resizing functions can now
3423 act on any window including internal ones.
3425 *** window-total-height/-width vs window-body-height/-width.
3426 The function `window-height' has been renamed to `window-total-height'
3427 and `window-width' has been renamed to `window-body-width'. The old
3428 names are provided as aliases. Two new functions `window-total-width'
3429 and `window-body-height' are provided.
3431 *** Window parameters specific to window handling functions.
3432 For each window you can specify a parameter to override the default
3433 behavior of a number of functions like `split-window', `delete-window'
3434 and `delete-other-windows'. The variable `ignore-window-parameters'
3435 allows to ignore processing such parameters.
3437 *** New semantics of third argument of `split-window'.
3438 The third argument of `split-window' has been renamed to SIDE and can be
3439 set to any of the values 'below, 'right, 'above, or 'left to make the
3440 new window appear on the corresponding side of the window that shall be
3441 split. Any other value of SIDE will cause `split-window' to split the
3442 window into two side-by-side windows as before.
3444 *** Window resizing functions.
3445 A new standard function for resizing windows called `window-resize' has
3446 been introduced. This and all other functions for resizing windows no
3447 longer delete any windows when they become too small.
3449 *** Deleting the selected window now selects the most recently selected
3450 live window on that frame instead.
3452 *** `adjust-window-trailing-edge' adjustments.
3453 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3454 is able to resize other windows if a window adjacent to the trailing
3455 edge cannot be shrunk any more. This makes its behavior more similar to
3456 that of Emacs 21 without compromising, however, its inability to delete
3457 windows which was introduced in Emacs 22.
3459 *** Window-local buffer lists.
3460 Windows now have local buffer lists. This means that removing a buffer
3461 from display in a window will preferably show the buffer previously
3462 shown in that window with its previous window-start and window-point
3463 positions. This also means that the same buffer may be automatically
3464 shown twice even if it already appears in another window.
3466 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3467 which if non-nil requires the buffer to be displayed in the currently
3468 selected window, signaling an error otherwise. If nil, another window
3469 can be used, e.g. if the selected one is strongly dedicated.
3471 *** `split-window-vertically' and `split-window-horizontally' renamed
3472 to `split-window-below' and `split-window-right' respectively.
3473 The old names are kept as aliases.
3477 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3478 named ACTION, and takes a display action of the same form as
3479 `display-buffer-base-action' (see Changes, above). A non-nil,
3480 non-list value is treated specially, as the old meaning.
3482 **** New variable `display-buffer-overriding-action'.
3484 **** The procedure of `display-buffer' etc. to choose a window is
3485 determined by combining `display-buffer-overriding-action',
3486 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3487 and `display-buffer-fallback-action'. The second and fourth of these
3488 are user-customizable variables.
3490 See the docstring of `display-buffer' for details.
3492 *** New functions `window-state-get' and `window-state-put'.
3493 These functions allow to save and restore the state of an arbitrary
3494 frame or window as an Elisp object.
3498 *** New variable `completion-extra-properties' used to specify extra
3499 properties of the current completion:
3500 - :annotate-function, same as the old completion-annotate-function.
3501 - :exit-function, function to call after completion took place.
3503 *** Functions on `completion-at-point-functions' can return any of the
3504 properties valid for `completion-extra-properties'.
3506 *** `completion-annotate-function' is obsolete.
3508 *** New `metadata' method for completion tables. The metadata thus returned
3509 can specify various details of the data returned by `all-completions':
3510 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3511 used to select a style in completion-category-overrides.
3512 - `annotation-function' to add annotations in *Completions*.
3513 - `display-sort-function' to specify how to sort entries in *Completions*.
3514 - `cycle-sort-function' to specify how to sort entries when cycling.
3516 *** `minibuffer-local-filename-must-match-map' is not used any more.
3517 Instead, the bindings in `minibuffer-local-filename-completion-map'
3518 are combined with `minibuffer-local-must-match-map'.
3520 *** New variable `completing-read-function' allows overriding the
3521 behavior of `completing-read'.
3523 ** `glyphless-char-display' can now distinguish between graphical and
3524 text terminal display, via a char-table entry that is a cons cell.
3526 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3527 Instead, the offending function is removed.
3531 *** New function `run-hook-wrapped' for running an abnormal hook by
3532 passing the hook functions as arguments to a "wrapping" function.
3533 Like `run-hook-with-args-until-success', it stops at the first
3534 non-nil return value.
3536 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3537 set of "wrapping" filters, similar to around advice.
3538 (A version of this macro was actually added in Emacs 23.2 but was not
3539 advertised at the time.)
3543 *** New macro `condition-case-unless-debug' (this was actually added in
3544 Emacs 23.1 as condition-case-no-debug, but not advertised)
3546 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3548 *** Variable `stack-trace-on-error' removed.
3550 *** The debugger can now "continue" from an error, which means it will
3551 jump to the error handler as if the debugger had not been invoked
3552 instead of jumping all the way to the top-level.
3554 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3555 This can be useful when `inhibit-quit' is set.
3557 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3558 named Emacs server instances.
3560 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3561 to redirect STDOUT to a file.
3563 ** The function `format-time-string' now supports the %N directive,
3564 for higher-resolution time stamps.
3566 ** New input reading functions
3568 *** New function `read-char-choice' reads a restricted set of
3569 characters, discarding any inputs not inside the set.
3571 *** The command `read-color' now requires a match for a color name
3572 or RGB triplet, instead of signaling an error if the user provides
3575 **** `facemenu-read-color' is now an alias for `read-color'.
3577 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3578 The variable is now used to load all kind of supported dynamic libraries,
3579 not just image libraries. The previous name is still available as an
3582 ** Syntax parsing changes
3584 *** New variable `syntax-propertize-function'.
3585 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3586 This allows syntax-table properties to be set independently from font-lock:
3587 just call syntax-propertize to make sure the text is propertized.
3588 Together with this new variable come a new hook
3589 syntax-propertize-extend-region-functions, as well as two helper functions:
3590 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3591 as-is; and syntax-propertize-rules which provides a new way to specify
3594 *** Syntax tables support a new "comment style c" additionally to style b.
3596 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3598 ** frame-local variables cannot be let-bound any more.
3600 ** Major and minor mode changes
3602 *** `set-auto-mode' now respects mode: local variables at the end of files,
3603 as well as those in the -*- line.
3605 *** `prog-mode' is a new major mode from which programming modes
3608 **** `prog-mode-hook' can be used to enable features for programming
3609 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3610 on-the-fly spell checking for comments and strings.
3612 *** New hook `change-major-mode-after-body-hook', run by
3613 `run-mode-hooks' just before any other mode hooks.
3615 *** Enabled globalized minor modes can be disabled in specific major modes.
3616 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3617 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3619 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3621 ** File-handling changes
3623 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3624 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3625 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3626 argument is supplied (see Trash changes, above).
3628 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3630 ** Tool-bars can display separators.
3631 Tool-bar separators are handled like menu separators in menu-bar maps,
3632 i.e. via menu entries of the form `(menu-item "--")'.
3636 *** Animated images support (currently animated gifs only).
3638 **** `image-animated-p' returns non-nil if an image can be animated.
3640 **** `image-animate' animates a supplied image spec.
3642 **** `image-animate-timer' returns the timer object for an image that
3645 *** `image-extension-data' has been renamed to `image-metadata'.
3646 The old name is an obsolete alias to the new one.
3648 *** Image mode can view any image type that ImageMagick supports.
3649 This requires Emacs to be built with ImageMagick support.
3651 **** New function `imagemagick-types', defined if ImageMagick support
3652 is enabled, returns a list of image file extensions that your
3653 ImageMagick installation supports.
3655 **** New function `imagemagick-register-types' enables ImageMagick
3656 image types in Image mode and in `create-image' and other helper
3659 **** New option `imagemagick-types-inhibit' excludes certain
3660 ImageMagick image types from `imagemagick-register-types'.
3662 **** With ImageMagick support, there are extra Image mode commands to
3663 resize and rotate images: `image-transform-fit-to-height',
3664 `image-transform-fit-to-width', `image-transform-set-rotation', and
3665 `image-transform-set-scale'.
3667 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3668 passes it to the mail user agent function. This argument specifies an
3669 action for returning to the caller after finishing with the mail. For
3670 example, this is used by Rmail to optionally delete a mail window.
3672 ** XML and HTML parsing
3673 If Emacs is compiled with libxml2 support, there are two new
3674 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3675 and `libxml-parse-xml-region' (which parses XML). Both return an
3676 Emacs Lisp parse tree.
3678 ** Networking and encryption changes
3680 *** `open-network-stream' can now be used to open an encrypted stream.
3681 It now accepts an optional `:type' parameter for initiating a TLS
3682 connection, directly or via STARTTLS. To do STARTTLS, additional
3683 parameters (`:end-of-command', `:success', `:capabilities-command')
3684 must also be supplied.
3686 *** New library gnutls.el.
3687 The new function `gnutls-available-p' returns non-nil if Emacs is
3688 built with GnuTLS support. The main entry points are
3689 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3690 these functions through `open-network-stream', because that can
3691 upgrade connections through STARTTLS opportunistically or use plain
3692 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3695 *** New primitive `secure-hash' that supports many secure hash algorithms:
3696 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3697 sha1.el has been removed. The `sha1' feature is provided by default.
3701 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3703 ** Progress reporters can now "spin".
3704 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3705 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3706 time you call `progress-reporter-update' on that progress reporter,
3707 with a nil or omitted VALUE argument, the reporter message is
3708 displayed with a "spinning bar".
3710 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3711 being reverted, even if the buffer has a local `revert-buffer-function'.
3713 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3714 If delayed-warnings-list is non-nil, the command loop calls
3715 `delayed-warnings-hook' after `post-command-hook'. At present, this
3716 is only used by Emacs on some platforms to display warnings during
3717 startup, which might otherwise not be noticed. This uses the
3718 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3720 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3722 ** New function `make-composed-keymap' that constructs a new keymap
3723 from multiple input maps. You can use this to make a keymap that
3724 inherits from multiple maps, eg:
3725 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3727 ** New function `string-prefix-p'.
3728 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3730 ** New reader macro ## that stands for the empty symbol.
3731 This means that the empty symbol can now be read back. Also, #: by itself
3732 (when not immediately followed by a possible symbol character) stands for
3733 an empty uninterned symbol.
3735 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3737 ** The following functions and variables are obsolete:
3739 *** `tooltip-use-echo-area' is obsolete.
3740 Rather than setting this to t, disable Tooltip mode instead.
3742 *** buffer-substring-filters is obsolete.
3743 Use `filter-buffer-substring-functions' instead.
3745 *** `byte-compile-disable-print-circle' is obsolete.
3747 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3748 Use `post-command-hook' instead.
3750 *** `font-lock-maximum-size' is obsolete.
3753 * Changes in Emacs 24.1 on Non-Free Operating Systems
3755 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3756 and also when HOME is set to C:\ by default.
3758 ** New configure.bat options
3760 *** --enable-checking builds Emacs with extra runtime checks.
3762 *** --distfiles specifies files to be included in binary distribution.
3764 *** --without-gnutls disables automatic GnuTLS detection.
3766 *** --lib for general library linkage, works with the USER_LIBS build variable.
3768 ** New make target `dist' to create binary distribution for MS Windows.
3770 ** The Lisp function `w32-default-color-map' is now obsolete.
3771 (It is only used internally in the Emacs C code.)
3773 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3774 reappear on mouse-over. (Requires OS X 10.6 or later.)
3776 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3777 other platforms, rather than inserting its contents into the buffer.
3780 ----------------------------------------------------------------------
3781 This file is part of GNU Emacs.
3783 GNU Emacs is free software: you can redistribute it and/or modify
3784 it under the terms of the GNU General Public License as published by
3785 the Free Software Foundation, either version 3 of the License, or
3786 (at your option) any later version.
3788 GNU Emacs is distributed in the hope that it will be useful,
3789 but WITHOUT ANY WARRANTY; without even the implied warranty of
3790 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3791 GNU General Public License for more details.
3793 You should have received a copy of the GNU General Public License
3794 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3800 paragraph-separate: "[
\f]*$"