* src/xdisp.c (produce_stretch_glyph): Use the correct face for
non-ASCII characters. Support :relative-width display spec on
Lisp strings, not just on buffer text.
* src/w32inevt.c (do_mouse_event): Reset the 'mouse_moved' flag of
the selected frame. Without that, this flag might remain set on a
TTY frame that is not displayed.
* lisp/mouse.el (mouse-drag-track):
* lisp/mouse-drag.el (mouse-drag-drag): Set 'track-mouse' to some
value neither t nor nil.
* src/keyboard.c (make_lispy_position): If track_mouse is Qt,
report event on tool or tab bar (Bug#51794).
* lisp/menu-bar.el (menu-bar-keymap): Don't use `lookup-key'
on the `keymap' arg.
* lisp/mouse.el (context-menu-global): Use `lookup-key global-map'
for the `keymap' arg of `menu-bar-keymap'.
(context-menu-local): Use `menu-bar-keymap' to sort `keymap'.
* lisp/mouse.el (context-menu-open): Call interactively a command
returned by `context-menu-map' such as `flyspell-correct-word' (bug#50067).
* lisp/textmodes/flyspell.el (flyspell-correct-word): Handle the
case when it's called by a key bound to `context-menu-open'.
Then it should work the same way as `C-c $' typed on misspelled word
where the arg `event' of `flyspell-correct-word-before-point' is nil.
(repeat--prev-mb): New internal variable.
(repeat-post-hook): Check the property 'repeat-map' on the symbol
from 'this-command' in addition to 'real-this-command'. Don't allow
repeatable maps in the activated minibuffer or in the minibuffer
from another command. Set 'repeat--prev-mb' at the end.
This fixes bug #51814.
* lisp/follow.el (follow-scroll-down): Do away with the optimization of doing
vertical-motion over only one window. Instead move over all windows, to
checck for being close to point-min, and setting point accordingly.
* src/callproc.c (emacs_spawn) <fork_done>: Define the label only
if USABLE_POSIX_SPAWN is defined, to avoid a compiler warning.
(cherry picked from commit a8fc080851)
posix_spawn is less error-prone than vfork + execve, and can make
better use of system-specific enhancements like 'clone' on Linux. Use
it if we don't need to configure a pseudoterminal.
Backported from commit a60053f836.
Unlike that commit, only define USABLE_POSIX_SPAWN on macOS, because
there posix_spawn is much faster than vfork.
Don't merge to master.
* configure.ac (HAVE_SPAWN_H, HAVE_POSIX_SPAWN)
(HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR)
(HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR_NP)
(HAVE_POSIX_SPAWNATTR_SETFLAGS, HAVE_DECL_POSIX_SPAWN_SETSID): New
configuration variables.
* src/callproc.c (USABLE_POSIX_SPAWN): New configuration macro.
(emacs_posix_spawn_init_actions)
(emacs_posix_spawn_init_attributes, emacs_posix_spawn_init): New
helper functions.
(emacs_spawn): Use posix_spawn if possible.
(cherry picked from commit a60053f836)
* src/coding.c (Fdecode_coding_region): Doc fix.
* doc/lispref/nonascii.texi (Coding System Basics)
(Explicit Encoding): Explain the significance of using 'undecided'
in 'decode-coding-*' functions.
* lisp/time-stamp.el (time-stamp-format): doc 'file' instead of 'path'.
* test/lisp/time-stamp-tests.el (formatz, format-time-offset):
Clarify the difference and similarity between these two test helpers.
