Merge from origin/emacs-25

Merge from origin/emacs-25

d841a03 ; Spelling fix
a6ae479 Post AppDefined events from the main thread ONLY (bug#23934)
d35d398 Update to the AUTHORS file for Bob Weiner
4d2f4df Revert "Fix local printer set to left aligned string formatter."
cd1b4d6 Revert "Fix ses-delete-blanks to delete only blanks + documen...
f7ceb8e Revert "Fix English."
baa7abd Improve doc strings of 'gud-gdb' and 'gdb'
aa4271a Fix doc string of 'minibuffer-message-timeout'
b275cc7 Fix English.
3c97b0f Fix ses-delete-blanks to delete only blanks + documentation.
272391f profiler: document prefix arg for tree expansion
442cc39 Clarify usage of eshell-visual-options
b443c3c Fix comment in files-in-below-directory
8a38e94 Fix local printer set to left aligned string formatter.
0f0b191 ; Fix typos in NEWS
6bdf687 ; * etc/NEWS: Remove temporary marks