Merge from origin/emacs-26

Merge from origin/emacs-26

460fe4a1bc ; Doc fixes
41adf3281e Avoid duplicate calls to xfree for the same pointer
3e7ebbe1bd Don't clobber docstrings of explicitly-defined mode hook v...
9c8fe0248b Avoid fullscreen ediff control frames by default (Bug#29026)
7d32176acc Fix the bug#24034 change (revno 9eb028f) causing infloop (...
ee493663ba Merge branch 'emacs-26' of git.savannah.gnu.org:/srv/git/e...
ca5eb0d0b7 Fix a typo in the ELisp manual
d10c9479ca Fix doc and doc-strings for minibuffer window related func...
18331d00da Fix "Args out of range" error in c-determine-limit.  Fixes...
edde35e6f8 * lisp/progmodes/perl-mode.el: Fix electric indentation wi...
056587c45f Extend mhtml submode region when in comment
4c4ad80848 Fix mthml submode lighting at end of buffer
557e252aa2 Remember more variables in mhtml-mode
336cd0a11a ; * lisp/select.el (select-enable-primary): Add missing pe...
134099bc90 ; * etc/NEWS (EUDC): Mark as not requiring documentation.
1a340274bf * etc/NEWS (EUDC): Deprecate BBDB 2.x backward compatibility.
4189d0ef7b Fix minibuffer window related docs and strings (Bug#28978)
2ebdde6e9c Add ChkTeX flymake backend for latex-mode
5b59841791 Fix doc typos
82a16c547b Fix some duplicate word typos
266888b1d7 * doc/lispref/commands.texi (Adjusting Point): Fix wording...
00c3c6d88d Avoid segfaults in 64-bit Windows builds
a8e6741066 Fix conversion of pixel coordinates to buffer position
d43b486f6c Fix doc strings in desktop.el
9102fb603e Add Index to ERT manual
68182a4710 Make manuals and NEWS consistent
451823b0e5 Don't allow (minibuffer-window-active-p nil) to return t
cc8f72ca22 Clarify obsolescence message for 'whitespace-tab'
50f711e7fa Fix some duplicate words typos
8bd9524a7c * lisp/button.el (button-activate): Fix doc typo.
0b0d91e60a * lisp/calendar/todo-mode.el (todo-toggle-mark-item): Fix ...
e6b4e5ffdf Fix some doc typos
e8636ac8cc Fix startup display on Cygwin
3926c5ad83 * src/fileio.c (Fset_default_file_modes): Fix typo in doc ...
9715317dfd * lisp/dired.el (dired-find-alternate-file): Doc fix.  (Bu...
9e442a001a Improve documentation of how faces are applied to display ...
1bda71ec3b Improve pixel-scroll-mode
196106d37d Support Certification Authority Authorization in dns-mode.el
ec08d70b4f Improve documentation of set-default-file-modes

# Conflicts:
#	etc/NEWS