Add support for pngquant to image-dired

* lisp/image-dired.el (image-dired-cmd-pngnq-program)
(image-dired-cmd-pngnq-options): Add support for pngquant.
Prefer, in this order: pngquant, pngnq-s9, pngnq-s for reasons of
speed and how actively maintained the projects seem to be.

Fix compilation errors with MinGW64 GCC 11

* lib-src/ntlib.c (IS_DIRECTORY_SEP): Remove redundant macro.

* lib-src/ntlib.c (DEFER_MS_W32_H):
* nt/addpm.c (DEFER_MS_W32_H):
* nt/cmdproxy.c (DEFER_MS_W32_H):
* nt/ddeclient.c (DEFER_MS_W32_H):
* nt/preprep.c (DEFER_MS_W32_H):
* nt/runemacs.c (DEFER_MS_W32_H): Fix a typo.
* nt/Makefile.in (BASE_CFLAGS): Add -I switches to pick up
config.h and lib/attribute.h.

Include <config.h> first in MS-Windows source

Fix define-erc-response-handler indentation

* lisp/erc/erc-backend.el (define-erc-response-handler): Add
proper indentation.

; Unbreak creating thumbnails in image-dired

* lisp/image-dired.el (image-dired-insert-thumbnail): Unbreak
creating thumbnails after my previous commit.

; * etc/NEWS: Fix typos.

Add new option help-link-key-to-documentation

* lisp/help.el (help-link-key-to-documentation): New user option.
(substitute-command-keys): Add a link from keys to the command they
are bound to, if the above new option is non-nil.  (Bug#8951)
* etc/NEWS: Announce the new option.

Make dired directory components clickable

* lisp/dired.el (dired-readin): Use it.

* lisp/dired.el (dired-make-directory-clickable): New user option.

* lisp/dired.el (dired--make-directory-clickable): New function
(bug#21973).

Don't use obsolete variable `find-tag-marker-ring`

* lisp/progmodes/js.el (js-find-symbol):
* lisp/progmodes/octave.el (octave-find-definition):
Call `xref-push-marker-stack` instead of manipulating the obsolete
variable `find-tag-marker-ring`.

Tweak bug-reference-tests

* test/lisp/progmodes/bug-reference-tests.el: Tweak tests a bit.

Clean up duplicated setting in scheme-mode-variables

* lisp/progmodes/scheme.el (scheme-mode-variables): Remove
repeated setting.

Allow matching non-.git URLs in bug-reference

* lisp/progmodes/bug-reference.el
(bug-reference--build-forge-setup-entry): Allow matching non-.git
URLs, with and without slashes (bug#51316).

Don't hard-code image-dired thumbnail type

* lisp/image-dired.el (image-dired-insert-thumbnail): Detect thumbnail
image type instead of hard-coding it.

Expand tests for image-type-from-file-header

* test/lisp/image-tests.el (image-tests--files): New defconst.
(image-tests--type-from-file-header): New defun.
(image-type-from-file-header-test/jpeg)
(image-type-from-file-header-test/pbm)
(image-type-from-file-header-test/png)
(image-type-from-file-header-test/svg)
(image-type-from-file-header-test/tiff)
(image-type-from-file-header-test/webp)
(image-type-from-file-header-test/xbm)
(image-type-from-file-header-test/xpm): New tests.
(image-type-from-file-header-test): Delete test.

Add tests for gif to src/image-tests.el

* test/src/image-tests.el (image-tests--images): Rename from
image-tests-files.  Add gif.
(image-tests-image-size/gif)
(image-tests-image-mask-p/gif)
(image-tests-image-metadata/gif): New tests.
* test/data/image/black.gif: New file.

Merge from origin/emacs-28

c7f53824a8 (origin/emacs-28) Update publicsuffix.txt from upstream
9a50f760e9 ; * doc/lispref/modes.texi (Hooks): Clarify wording.  (Bug...
e154fd9119 Refer to the info node on keymaps in map-keymap docstring
4fd5c8df67 Clarify abnormal hook documentation
6fa5206770 Update to Org 9.5-59-g52e6f1
39413a45bf ; * doc/lispref/functions.texi (Calling Functions): Fix la...
43914ab01f Improve documentation of cl-reduce
ef37a86cac Improve documentation of apply-partially
1e8be48738 Fix typos
8c5fbd712b Revert commit 225ca617b7, and apply another fix
cdbd03345d Fix documentation of posn-at-x-y
598732c899 ; * src/vm-limit.c (get_lim_data): Fix a typo.  (Bug#18238)
efdffd86c5 ; * etc/refcards/README: Prefer HTTPS in link.

# Conflicts:
# etc/NEWS

Update publicsuffix.txt from upstream

* etc/publicsuffix.txt: Update from
https://publicsuffix.org/list/public_suffix_list.dat
dated 2021-10-16 16:33:47 GMT.

; * doc/lispref/modes.texi (Hooks): Clarify wording.  (Bug#34588)

Make dired-x-guess-file-name-at-point obsolete

* lisp/dired-x.el (dired-x-guess-file-name-at-point): Make
obsolete in favour of 'thing-at-point'.
(dired-x-read-filename-at-point): Use 'thing-at-point' instead of
above obsolete function.

Refer to the info node on keymaps in map-keymap docstring

* src/keymap.c (Fmap_keymap): Doc fix; add a reference to the Info
node '(elisp) Keymaps'.  (Bug#30958)

Clarify abnormal hook documentation

* doc/lispref/hooks.texi (Standard Hooks):
* doc/lispref/modes.texi (Hooks): Clarify wording of "abnormal
hook" documentation.  (Bug#34588)

Update to Org 9.5-59-g52e6f1

; * doc/lispref/functions.texi (Calling Functions): Fix last change.

Improve documentation of cl-reduce

* doc/misc/cl.texi (Mapping over Sequences): Change the
explanation of 'cl-reduce' so you don't need to have a major in
mathematics to understand it.  (Bug#24014)

Improve documentation of apply-partially

* doc/lispref/functions.texi (Calling Functions): Improve
documentation of 'apply-partially' to be slightly more clear with
regards to function arity.  (Bug#17623)

Check for image library in image-dired-tests.el

* test/lisp/image-dired-tests.el
(image-dired-tests-get-exif-file-name): Check for jpeg library.

Support :company-deprecated completion property

* lisp/progmodes/elisp-mode.el (elisp--company-deprecated):
New function.
(elisp-completion-at-point): Use it.

Fix typos

* doc/emacs/cmdargs.texi:
* etc/DEBUG:
* etc/NEWS: Fix typos.

Revert commit 225ca617b7, and apply another fix

* lisp/minibuffer.el (read-file-name-default): Revert commit
225ca617b7.  (Bug#50976).

* lisp/shell.el (shell): Remove volume letter for remote shell
file name.  (Bug#49229)

* test/infra/gitlab-ci.yml (variables, default): Increase timeout to 4 hours.

Revert "CC Mode: Fontify "found types" which are recognized after being ..."

This reverts commit 51719617eb19833056618ebac403cdcaf711551a.  The commit
caused a hang at start-up with a big desktop.

Fix documentation of posn-at-x-y

* doc/lispref/commands.texi (Accessing Mouse): Fix documentation of
'posn-at-x-y' to match docstring.  (Bug#15783)

Partially remove exiftool dependency from image-dired.el

* lisp/image-dired.el (exif): Require.
(image-dired-cmd-read-exif-data-program)
(image-dired-cmd-read-exif-data-options)
(image-dired-get-exif-data): Make obsolete in favour of using
exif.el.  This removes a dependency on external exiftool for some
operations.
(image-dired-get-exif-file-name)
(image-dired-thumbnail-set-image-description): Use exif.el
functions instead of exiftool.
* lisp/image/exif.el (exif-tag-alist): Add description and
copyright fields.
* test/lisp/image-dired-tests.el: New file.

; * src/vm-limit.c (get_lim_data): Fix a typo.  (Bug#18238)

Add new function exif-field

* test/lisp/image/exif-tests.el (exif-elem): Move function from here...
* lisp/image/exif.el (exif-field): ...to here, and rename.
(exif-orientation):
* test/lisp/image/exif-tests.el (test-exif-parse)
(test-exif-parse-short): Use above new function.

Add links to commentary reached with finder-list-keywords

* lisp/finder.el (finder-goto-xref): Move from here...
* lisp/emacs-lisp/package.el (package--finder-goto-xref): ...to
here.  Make the old name into an obsolete function alias.
(package--finder-xref): New button type.
(package--describe-add-library-links): Factor out new function...
* lisp/finder.el (finder-commentary): ...from here.
(describe-package-1): Call above new function.  This fixes an
issue where commentaries reached via 'finder-list-keywords' did
not have links.  (Bug#10814)

* src/image.c (webp_load): Fix thinkos.

; * etc/refcards/README: Prefer HTTPS in link.

CC Mode: Fontify "found types" which are recognized after being first scanned

This aims to fix the scenario where on jit-lock's first scan of a type, it is
not recognized as such, and only later does this happen.  The fontification of
such found types is now done by background scanning in short time slices
immediately after initialising the mode.

* lisp/progmodes/cc-engine.el (c-add-type-1): New function.
(c-add-type): Extract c-add-type-1 from it, and reformulate the mechanism for
protecting c-found-types from excessive partial identifiers.

* lisp/progmodes/cc-fonts.el (c-font-lock-complex-decl-prepare): Remove the
code which cleared c-found-types on fontification at BOB.
(c-find-types-background): New function, based on c-font-lock-declarations).
(c-types-finder-timer-func): New function.
(c-re-redisplay-timer): New variable.
(c-force-redisplay, c-fontify-new-found-type): New functions.

* lisp/progmodes/cc-mode.el (c-type-finder-timer): New variable.
(c-leave-cc-mode-mode): Nullify c-post-command-hook and c-type-finder-timer
when the last CC Mode buffer of a session is killed.
(c-type-finder-pos): New variable.
(c-basic-common-init): Initialize c-type-finder-pos and c-type-finder-timer.
(c-new-id-start, c-new-id-end, c-new-id-is-type): New variables.
(c-update-new-id): New function.
(c-post-command): New post command hook function, used for checking moving
away from partially typed identifiers, and making them full identifiers.
(c-before-change): Add code to clear c-found-types on a buffer change at BOB.
(c-after-change): Call c-update-new-id to keep track of partially typed
identifiers.

* doc/misc/cc-mode.texi (Found Types): New @section in the @Chapter Font
Locking.

* lisp/progmodes/cc-vars.el (c-type-finder-time-slot)
(c-type-finder-repeat-time, c-type-finder-chunk-size): New customizable
options.

Merge from origin/emacs-28

b0d64be0bc (origin/emacs-28) Improve some NEWS entries
7fde84e881 Improve documentation of syntax-ppss-context slightly
5ecbed01b2 ; * test/lisp/mh-e/mh-utils-tests.el: Update macro declara...
168665da59 Move some xwidget entries
efde024361 time-stamp-tests: improvements to test macros
06c944cff1 Fix rfc6068-parse-mailto-url autoload
9b6b5e37ef Regexp-quote github domains in bug-reference
1f6cdeb12c Ensure valid end/beginning lines in message-mark-inserted-...
9b46150ab0 * etc/NEWS: Improve 'repeat-mode' entry.
9c37b812da ; * lisp/repeat.el (repeat-mode): Fix docstring typo.
caf87d80fa * lisp/repeat.el (repeat-keep-prefix): Expand description.
24083c8d13 * lisp/net/eww.el (eww-retrieve-command): Add :tag.
cf7d8fb1d7 Add description of cards to etc/refcards/README
d2849cc645 Fix 'calculate-lisp-indent' when "[" starts containing sex...
2a0a368ddc Fix typo in doc/emacs/anti.texi
9529e1d2fb Update doc of Edebug specification for macros
5bc522b4f4 ; * lisp/simple.el (kill-region): A better fix for bug#51320.
ee6bdd6eef Fix non-interactive behavior of 'kill-region'
2b7655ca0e ; More accurate doc string for 'tab-bar-format'
2841e26744 * test/lisp/dabbrev-tests.el: Use 'kbd' for readable keys.
1cdb4d2077 * lisp/menu-bar.el (menu-bar-keymap): Add optional arg KEY...

# Conflicts:
# etc/NEWS
# lisp/progmodes/bug-reference.el

Improve some NEWS entries

* etc/NEWS: Improve some NEWS entries.

Improve documentation of syntax-ppss-context slightly

* doc/lispref/syntax.texi (Parser State): Document all possible return
values from 'syntax-ppss-context'.

; * test/lisp/mh-e/mh-utils-tests.el: Update macro declarations.

Move some xwidget entries

* etc/NEWS: Move xwidget entries to correct location.

time-stamp-tests: improvements to test macros

test/lisp/time-stamp-tests.el: Update macro declarations.
(formatz-generate-tests): Don't nconc onto a constant list.
Tests now run 12% faster in batch mode.

Fix rfc6068-parse-mailto-url autoload

* lisp/net/browse-url.el (rfc6068-parse-mailto-url): Fix autoload
cookie (bug#51333).

Regexp-quote github domains in bug-reference

* lisp/progmodes/bug-reference.el
(bug-reference--build-forge-setup-entry): Regexp-quote the domain
(bug#51316).

Ensure valid end/beginning lines in message-mark-inserted-region

* lisp/gnus/message.el (message-mark-inserted-region): Ensure
there's a newline before inserting the end line (bug#51324).

Adapt some emba parameters

* test/infra/Dockerfile.emba (emacs-inotify): Reduce debug options.

* test/infra/gitlab-ci.yml (test-native-comp-speed0): Adapt make_params.

; * nt/INSTALL: Fix a typo.

Fix WebP support on MS-Windows

* src/image.c (WebPDecodeRGBA, WebPDecodeRGB, WebPFree): Use
correct names and argument lists in DEF_DLL_FN; fix typos.
(WebPGetFeaturesInternal): Load this instead of WebPGetFeatures,
which is a static inline function in webp/decode.h.
(WebPGetFeatures): Redirect to call WebPGetFeaturesInternal.

* lisp/term/w32-win.el (dynamic-library-alist): Fix the name of
the WebP symbol.

* configure.ac (HAVE_WEBP): Fix detection of libwebp on MinGW.

* nt/INSTALL.W64:
* nt/INSTALL: Update information about libwebp availability.

* etc/NEWS: Improve 'repeat-mode' entry.

; * lisp/repeat.el (repeat-mode): Fix docstring typo.

* lisp/repeat.el (repeat-keep-prefix): Expand description.

* lisp/net/eww.el (eww-retrieve-command): Add :tag.

Add WebP image format support (Bug#51296)

* configure.ac (--with-webp): New option.
(HAVE_WEBP): New variable.
(emacs_config_features): Add webp.
* src/image.c (enum webp_keyword_index) [HAVE_WEBP]: New enum.
(webp_format) [HAVE_WEBP]: New variable.
(webp_image_p, init_webp_functions, webp_load) [HAVE_WEBP]: New
functions for WebP support.
(image_types) [HAVE_WEBP]: Define WebP format.
(syms_of_image) <Qwebp> [HAVE_WEBP]: New DEFSYM.  Add image type Qwebp.
* src/Makefile.in (LIBIMAGE): Add WEBP_LIBS.

* lisp/files.el (auto-mode-alist):
* lisp/image-file.el (image-file-name-extensions):
* lisp/image.el (image-type-header-regexps)
(image-type-file-name-regexps, image-type-auto-detectable): Add WebP
support.
* lisp/term/w32-win.el (dynamic-library-alist): Add the libwebp DLL.

* INSTALL:
* admin/CPP-DEFINES:
* doc/lispref/display.texi (Image Formats, Other Image Types):
* nt/INSTALL: Document WebP support.

* test/lisp/image-tests.el (image-find-image)
(image-type-from-file-name): Expand tests.
* test/src/image-tests.el (image-tests--files): Add WebP.
(image-tests-image-size/webp, image-tests-image-mask-p/webp)
(image-tests-image-metadata/webp): New tests.
* test/data/image/black.webp: New file.

In 'window-text-pixel-size' use actual mode line heights if wanted (Bug#38181)

* src/xdisp.c (Fwindow_text_pixel_size): Run display_mode_line
when MODE_LINES wants it to take actual mode line heights into
account (Bug#38181).

Add description of cards to etc/refcards/README

* etc/refcards/README: List all the generated reference cards,
including their translations.  (Bug#8932)

Fix 'calculate-lisp-indent' when "[" starts containing sexp (Bug#51312)

* lisp/emacs-lisp/lisp-mode.el (calculate-lisp-indent): Handle
arbitrary paren syntax after skipping whitespace backwards within
containing sexp (Bug#51312).

; Revert parts of previous commit

* admin/unidata/unidata-gen.el (unidata-gen-table)
(unidata-gen-table-symbol, unidata-gen-table-integer)
(unidata-gen-table-numeric, unidata-gen-table-word-list)
(unidata-describe-decomposition):
* lisp/composite.el (unicode-category-table):
* lisp/files.el (recover-file):
* lisp/frame.el (frames-on-display-list, frame-background-mode):
* lisp/language/indian.el (script-regexp-alist): Revert parts of
previous commit; it seemed innocent but caused issues.

Fix typo in doc/emacs/anti.texi

* doc/emacs/anti.texi (Antinews): Fix typo.  (Bug#51325)
Reported by Po Lu <luangruo@yahoo.com>.

Update doc of Edebug specification for macros

doc/lispref/edebug.texi:  Update documentation of Edebug specification:
- Do not document "0" as a recommended shortcut for non-instrumented
arguments; nobody knows about nor uses this, so don't encourage it.
- Add an example equivalent to (declare (debug (&rest sexp))).

Remove redundant #' before lambda

* admin/unidata/unidata-gen.el (unidata-gen-table)
(unidata-gen-table-symbol, unidata-gen-table-integer)
(unidata-gen-table-numeric, unidata-gen-table-word-list)
(unidata-describe-decomposition):
* lisp/apropos.el (apropos-user-option):
* lisp/bookmark.el (bookmark-bmenu-search):
* lisp/composite.el (unicode-category-table):
* lisp/elec-pair.el (electric-pair--balance-info):
* lisp/electric.el (electric-quote-chars):
* lisp/emulation/cua-base.el (cua-rectangle-mark-key):
* lisp/epa-hook.el (epa-file-encrypt-to):
* lisp/faces.el (face-font-selection-order)
(face-font-family-alternatives, face-font-registry-alternatives)
(face-valid-attribute-values, tty-run-terminal-initialization):
* lisp/files.el (recover-file, file-expand-wildcards):
* lisp/frame.el (frames-on-display-list):
* lisp/help-at-pt.el (help-at-pt-display-when-idle):
* lisp/help-fns.el (help-fns--face-attributes):
* lisp/ido.el (ido-mode, ido-unc-hosts):
* lisp/isearch.el (isearch-highlight-regexp)
(isearch-highlight-lines-matching-regexp):
* lisp/language/indian.el (script-regexp-alist):
* lisp/language/lao.el:
* lisp/leim/quail/ipa.el (ipa-x-sampa-prepend-to-keymap-entry):
* lisp/mh-e/mh-folder.el (mh-process-commands):
* lisp/mh-e/mh-mime.el (mh-display-with-external-viewer):
* lisp/ps-mule.el (ps-mule-end-job):
* lisp/ps-print.el (ps-color-scale, ps-background-pages)
(ps-background-text, ps-background-image, ps-background)
(ps-begin-job, ps-print-translation-table):
* lisp/recentf.el (recentf-sort-ascending)
(recentf-sort-descending, recentf-sort-basenames-ascending)
(recentf-sort-basenames-descending)
(recentf-sort-directories-ascending)
(recentf-sort-directories-descending):
* lisp/replace.el (occur-engine-add-prefix):
* lisp/select.el (xselect--encode-string):
* lisp/server.el (server-use-tcp):
* lisp/ses.el (ses-sort-column):
* lisp/sort.el (sort-columns):
* lisp/term/ns-win.el (window-system-initialization):
* lisp/tree-widget.el (tree-widget-image-formats):
* lisp/whitespace.el (whitespace-report-region): Remove redundant #'
before lambda.

; * lisp/simple.el (kill-region): A better fix for bug#51320.

Add comment on reworking a section in emacs-lisp-intro.texi

* doc/lispintro/emacs-lisp-intro.texi (Body of mark-whole-buffer):
Add comment about how one could rework this section.

Fix non-interactive behavior of 'kill-region'

* lisp/simple.el (kill-region): Actually ignore BEG and END when
REGION is non-nil.  Doc fix.  (Bug#51320)

; More accurate doc string for 'tab-bar-format'

* lisp/tab-bar.el (tab-bar-format): Make the doc string more
accurate.  (Bug#51247)

Configure Emacs on emba with debug options

* test/infra/Dockerfile.emba (emacs-base): Install gdb.
(emacs-inotify): Configure debug options.

* test/lisp/dabbrev-tests.el: Use 'kbd' for readable keys.

(dabbrev-expand-test, dabbrev-completion-test)
(dabbrev-completion-test-with-argument):
Use 'kbd' to format keys for 'execute-kbd-macro'.
(dabbrev-expand-test): Fix docstring.

* lisp/menu-bar.el (menu-bar-keymap): Add optional arg KEYMAP (bug#50067).

* lisp/mouse.el (context-menu-global): Use 'menu-bar-keymap' with
its arg KEYMAP set to 'global-map'.

Actually fix the Pango build problem

* src/gtkutil.c (xg_weight_to_symbol): Don't break the build on
older systems.

Merge from origin/emacs-28

0545c70c16 (origin/emacs-28) ; * src/keyboard.c (readable_events): Ad...
805ed8d318 Fix todo-mode AOT test failures (bug#51308)
8f42ff31f6 Fix hi-lock AOT test failures (bug#51308)
8002fcd4b9 Fix socks test
4540130312 ; Fix typo
59df93e2dd * lisp/help.el (help--analyze-key): Add new arg BUFFER (bu...
cb8b12b56d Improve docstrings and NEWS item of 'repeat-mode'
06fe499614 * lisp/tab-bar.el (tab-bar-menu-bar): New command (bug#512...
8358da9c4c Display a tab bar item as sunken when appropriate
29fdc65860 Fix tab bar item highlight when a mouse click is dropped
7236592668 Refer to mouse-highlight from make-pointer-invisible docst...
cf4394a397 * etc/PROBLEMS: Add hex codepoint for NO-BREAK SPACE
2d647e88fa Describe how to debug fontconfig issues
c916040921 Adapt Tramp tests
1bb14f93f1 Convert ANSI color definitions in themes to use faces (e.g...
8e7cd29712 Revert "Revert back to using ESC as viper-ESC-key again"
91d71b38a3 Fix inset rectangle corners when sides aren't drawn (bug#5...
5c1a575ef4 Don't use color escape sequences in vc-git-expanded-log-entry
d7f595cc89 Code cleanup in tramp-tests.el
548a5db611 ; etc/NEWS fix wording

# Conflicts:
# etc/NEWS

Fix build on systems with older Pango versions

* src/gtkutil.c (xg_weight_to_symbol): Don't break the build on
older systems.

Fix bold/black in w32_to_fc_weight

* src/w32font.c (w32_to_fc_weight): Use symbols.

; * src/keyboard.c (readable_events): Add a comment.

Fix todo-mode AOT test failures (bug#51308)

Fix hi-lock AOT test failures (bug#51308)

Fix socks test

* test/lisp/net/socks-tests.el (socks-tests-v4-basic): Fix failure
under native-comp (bug#51308).

Add a comment to the Turkish casefiddle test

Support the "medium" font weight

* lisp/faces.el (set-face-attribute): Mention new font weights in
doc string.
* src/font.c (struct table_entry): Allow more synonyms.
(weight_table): Expand to support separating medium and normal
weights.  Also add heavy/ultra-heavy and some other variants.
(font_parse_fcname): Support more names.

* src/gtkutil.c (xg_weight_to_symbol): Support all the Pango weights.
(xg_style_to_symbol): Make into functions.
(xg_get_font): Adjust.

* src/w32font.c (w32_to_fc_weight): Use symbols.

* src/xfaces.c (syms_of_xfaces): Add the new symbols.

Add some tests for floatfns.c

* test/src/floatfns-tests.el (floatfns-tests-cos)
(floatfns-tests-sin, floatfns-tests-tan, floatfns-tests-isnan)
(floatfns-tests-exp, floatfns-tests-expt, floatfns-tests-log)
(floatfns-tests-sqrt, floatfns-tests-abs, floatfns-tests-logb)
(floatfns-tests-ceiling, floatfns-tests-floor)
(floatfns-tests-round, floatfns-tests-truncate)
(floatfns-tests-fceiling, floatfns-tests-ffloor)
(floatfns-tests-fround, floatfns-tests-ftruncate)
(divide-extreme-sign): New tests.

; Fix typo

* lisp/help.el (help--analyze-key): Add new arg BUFFER (bug#51173).

* lisp/help.el (describe-key): Use BUFFER as arg for help--analyze-key.
(describe-key-briefly): Change arg UNTRANSLATED deprecated in 27.1
to BUFFER.

* lisp/gnus/gnus-art.el (gnus-article-describe-key)
(gnus-article-describe-key-briefly): Call describe-key and
describe-key-briefly with first arg as a cons with raw keys,
and the BUFFER arg set to the current buffer.

Improve docstrings and NEWS item of 'repeat-mode'

* lisp/repeat.el (repeat-exit-timeout, repeat-echo-function)
(repeat-in-progress, repeat-map): Update docstrings.

* lisp/tab-bar.el (tab-bar-menu-bar): New command (bug#51247).

(tab-bar-format): Rename option 'tab-bar-format-menu-global' to
'tab-bar-format-menu-bar'.
(tab-bar-format-menu-bar): Rename from 'tab-bar-format-menu-global'.

Display a tab bar item as sunken when appropriate

When the mouse pointer is pressed on the tab bar, moved out of the tab
bar, and moved back in, it would be more appropriate to behave like
other programs by displaying the item as sunken.

* src/xdisp.c (note_tab_bar_highlight): Display item as sunken if the
mouse pointer returns to the tab bar down.

Fix tab bar item highlight when a mouse click is dropped

* src/xdisp.c (note_mouse_highlight): Clear last_tab_bar_item if the
movement wasn't made on top of the tab bar.

Refer to mouse-highlight from make-pointer-invisible docstring

* src/frame.c (syms_of_frame) <Vmake_pointer_invisible>: Doc fix;
add reference to 'mouse-highlight'.  (Bug#42889)

* etc/PROBLEMS: Add hex codepoint for NO-BREAK SPACE

Describe how to debug fontconfig issues

* etc/PROBLEMS: Add FC_DEBUG usage pointers.

Adapt Tramp tests

* test/lisp/net/tramp-archive-tests.el (tramp-archive-test45-auto-load):
Adapt code snippet.

* test/lisp/net/tramp-tests.el (tramp-test29-start-file-process)
(tramp-test30-make-process): Adapt tests.
(tramp--test-supports-set-file-modes-p): Renamed from
`tramp--test-supports-file-modes-p'.  Adapt all callees.
(tramp-test35-exec-path): Use it.

; * etc/NEWS: fix typos

Fix typo in previous smerge-mode-map change

* lisp/vc/smerge-mode.el (smerge-mode-map): Fix typo (bug#51303).

Convert ANSI color definitions in themes to use faces (e.g. 'ansi-color-red')

* etc/themes/dichromacy-theme.el:
* etc/themes/leuven-theme.el:
* etc/themes/misterioso-theme.el:
* etc/themes/tango-theme.el:
* etc/themes/tango-dark-theme.el:
* etc/themes/wombat-theme.el: Convert ANSI color definitions to
use faces.

Avoid excessive specbinding in all-completions

* src/minibuf.c (match_regexps):
(Ftry_completion):
(Fall_completions):
(Ftest_completion): Use fast_string_match_internal to match against
regexps in completion-regexp-list without having to bind
case-fold-search.

Revert "Revert back to using ESC as viper-ESC-key again"

This reverts commit 5d522b430bd5ecfb8f082906cd634883dbb68f3e.

The change led to M-x not working in non-gui Emacsen (bug#51253).

Further fixes for Turkish case changes in unibyte strings

* src/casefiddle.c (struct casing_context): Add new slot to keep
track of what the previous operation was.
(case_character_impl): Set it.
(do_casify_unibyte_string): Use it to handle Turkish correctly.

Add new macro with-locale-environment

* lisp/international/mule-cmds.el (with-locale-environment): New macro.
(current-locale-environment): New variable.

Add some tests for fns.c

* test/src/fns-tests.el (fns-tests-identity, fns-tests-random)
(fns-tests-length, fns-tests-safe-length)
(fns-tests-string-bytes): New tests.

Remove some XEmacs compat code from custom.el

* lisp/custom.el (deftheme, custom-declare-theme): Remove XEmacs
compat code.