Allow nil value for filter-buffer-substring-function

* lisp/simple.el
(filter-buffer-substring): Support a nil value to be more resilient.
(filter-buffer-substring-function): Doc fix; improve and update for
above change.

Support imenu in emacs-news-mode

* lisp/outline.el (outline-imenu-generic-expression): New variable
broken out from...
(outline-mode): ...here.
* lisp/textmodes/emacs-news-mode.el (emacs-news--mode-common): Use
above new variable to add imenu support.

Fix 'posn-at-point' around several 'display' properties

* src/xdisp.c (pos_visible_p): Fix the case when CHARPOS is hidden
by a display property, and its neighbors are also hidden.
(Bug#45915)

* doc/misc/eieio.texi (Introduction, Generics): Remove outdated limits

Reported by Hokomo <hokomo@airmail.cc>.

Improve check for misleading 'cl-case' cases (Bug#57915).

* lisp/emacs-lisp/cl-macs.el (cl-case): Check that the case is of the
form (quote FOO), not just (quote).
* test/lisp/emacs-lisp/cl-macs-tests.el (cl-case-no-warning): New unit test.

Prefer DE specific commands to set wallpaper

* lisp/image/wallpaper.el (wallpaper--default-commands): Rearrange
order to prioritize desktop environment specific commands before
general Wayland commands like "wbg" or even "swaybg".  (Bug#57781)

Avoid an unnecessary call to intern

* src/doc.c (Fdocumentation): Prefer DEFSYM to using intern directly.

Fix eshell directory and executable completion on action t

* lisp/eshell/em-cmpl.el (eshell--pcomplete-executables): New
function (bug#57905).
(eshell--complete-commands-list): Use it.

Copyright-paperwork-exempt: yes

; * Makefile.in: Fix typo.

Don't save bookmark context from encrypted files

* doc/emacs/regs.texi (Bookmarks): Mention this.
* lisp/bookmark.el (bookmark-make-record): Don't include context
in encrypted files (bug#57856).

* lisp/epa-hook.el (epa-file-name-p): New function.

; * Makefile.in: Add "make bootstrap configure=default" as a first choice.

Revert 60de98f6f0 and b2d419ed5b.

* Makefile.in: Readd warnings about "git clean -fdx"

Revert "; * Makefile.in: Partly revert 5b3c4004a9."

This reverts commit e54da280ff4bf458c437f87dd64e848cdc75479c.

make gen-clean remove some newly-added generated files

* admin/unidata/Makefile.in (gen-clean): Remove some newly-added
generated files.

; * Makefile.in: Partly revert 5b3c4004a9.

Merge from origin/emacs-28

a2f9788cbc ; Minor copyedits of *-frame-alist doc strings
c200098dde ; * src/intervals.c (get_local_map): Fix commentary.
69cc3d38bc Fix Tramp error with eshell integration

Remove calls to intern with a static string from code that runs on X

* Makefile.in (actual-all): Reword build failure advice.

* src/bytecode.c (exec_byte_code, syms_of_bytecode):
* src/font.c (syms_of_font):
* src/hbfont.c (uni_combining):
* src/xfns.c (Fx_display_backing_store, Fx_display_visual_class)
(x_create_tip_frame, Fx_show_tip, syms_of_xfns):
* src/xfont.c (xfont_supported_scripts, xfont_driver)
(syms_of_xfont):
* src/xsmfns.c (Fhandle_save_session, syms_of_xsmfns): Remove
calls to intern with a static string.

Get rid of intern calls to static strings in xterm.c

* src/xterm.c (x_cr_export_frames): Use Qconcat instead of
interning concat.
(syms_of_xterm): New defsym Qconcat.

Fix GC protection of scroll bar windows

* src/xterm.c (x_atom_refs): Add _EMACS prefix to
vendor-specific scroll-bar atoms.
(handle_one_xevent): Unprotect windows immediately upon
receiving an _EMACS_SCROLLBAR event, instead of waiting for the
event to be put on the keyboard buffer.  Reported by martin
rudalics <rudalics@gmx.at>.

Display a help message when building Emacs failed.

* Makefile.in (actual-all): New target, replacing the former 'all'
target.
(advice-on-failure, sanity-check): New targets.
(all): Use the new targets.
(bootstrap-all): New target, identical to 'all' but meant for the
'bootstrap' target in GNUmakefile.
(actual-bootstrap): New target, replacing the former 'bootstrap'
target.  Use the 'actual-all' target instead of the 'all' target.
(bootstrap): Use the new targets.

* GNUmakefile (bootstrap): Use the new 'bootstrap-all' target.

; Minor copyedits of *-frame-alist doc strings

* src/frame.c (syms_of_frame) <default-frame-alist>:
* lisp/frame.el (initial-frame-alist): Minor doc fixes.

; * src/intervals.c (get_local_map): Fix commentary.

Prefer using DEFSYMs to intern with wrong_type_argument

* src/data.c (syms_of_data) <Qbooleanp>:
* src/fileio.c (syms_of_fileio) <Qinserted_chars, Qfile_offset>:
* src/font.c (syms_of_font) <Qfont_extra_type>: New DEFSYMs.
* src/dbusbind.c (xd_signature, xd_append_arg):
* src/fileio.c (file_offset, Finsert_file_contents):
* src/font.c (Ffontp): Prefer using above new DEFSYMs to using intern
directly.

; Fix doc strings in osc.el

* lisp/osc.el (osc-filter-region, osc-apply-on-region)
(osc-window-title-handler, osc-directory-tracker)
(osc-hyperlink-handler, osc-for-compilation-buffer)
(osc-compilation-filter): Fix doc strings.
`

; * etc/NEWS: Fix typos and punctuation in OSC entry.

Minor Tramp cleanups

* lisp/net/tramp-compat.el (tramp-compat-rx): Declare.

* lisp/net/tramp-integration.el (info-lookup-maybe-add-help):
Fix `rx' call.

Turn gv-synthetic-place into a function

This fixes Bug#57397.

* lisp/emacs-lisp/gv.el (gv-synthetic-place): Make a function and add
trivial compiler macro to avoid decreasing efficiency.

Add NEWS entry for osc.el (bug#57821)

Fix osc.el compilation warning

* lisp/osc.el (compilation-filter-start): Avoid compilation warning.

OSC escape sequences filter for compilation buffer

* lisp/osc.el (osc-control-seq-regexp): Regexp matching OSC control sequence.
(osc-filter-region): Filter out OSC control sequences from region.
(osc-for-compilation-buffer): Determines what to do with OSC escape
sequences in compilation output.
(osc-compilation-filter): Implement OSC escape sequence handling for
compilation output (bug#57821).

Handle OSC command to set window title

* lisp/osc.el (osc-handlers): Bind osc-window-title-handler to OSC
command 2.
(osc-window-title): Local variable storing string extracted from OSC
command 2.
(osc-window-title-handler): Copy text from OSC command 2 to
osc-window-title (bug#57821).

Extract support of OSC escape sequences from comint

* lisp/comint.el (osc): Now requires osc.el.
(comint-osc-directory-tracker): Alias to osc-directory-tracker.
(comint-osc-hyperlink-handler): Alias to osc-hyperlink-handler.
(comint-osc-hyperlink-map): Alias to osc-hyperlink-map.
(comint-osc-handlers): Alias to osc-handlers.
(comint-osc-hyperlink): Alias to osc-hyperlink.
(comint-osc-process-output): Rewritten to call osc-apply-on-region.
* lisp/osc.el (osc-handlers): Clone comint-osc-handlers.
(osc--marker): Clone comint-osc--marker.
(osc-apply-on-region): Implementation taken from comint-osc-process-output.
(osc-directory-tracker): Clone from comint-osc-directory-tracker.
(osc-hyperlink-map): Clone from comint-osc-hyperlink-map.
(osc-hyperlink): Clone from comint-osc-hyperlink.
(osc-hyperlink--state): Clone from comint-osc-hyperlink--state.
(osc-hyperlink-handler): Clone from comint-osc-hyperlink-handler.
* test/lisp/osc-tests.el (osc): Test osc-apply-region (bug#57821).

Improve the initial-frame-alist doc string

* lisp/frame.el (initial-frame-alist): Clarify how to set this
variable (bug#57890).

Restore the point after aborting an image crop

* lisp/image/image-crop.el (image-crop): Restore point after
aborted cropping (bug#57874).

pulse-momentary-highlight-one-line: Act on visual line

* lisp/cedet/pulse.el (pulse-momentary-highlight-one-line):  Act on
entire visual line, ignoring fields etc (bug#57876).

Remap 'up-list' in python-mode-map

* lisp/progmodes/python.el (python-mode-map): Remap 'up-list' to
'python-nav-up-list' (bug#57885).

Add new command python-shell-restart

* lisp/progmodes/python.el (python-shell-restart): New command (bug#57885).

Fix Tramp error with eshell integration

* lisp/net/tramp-integration.el (tramp-eshell-directory-change):
Respect local `default-directory'.  (Bug#57556)

image-dired: Don't require subr-x

* lisp/image/image-dired-dired.el (subr-x):
* lisp/image/image-dired.el (subr-x): Don't require, since string-join
is now autoloaded.

; Instrument filenotify-tests

Author:

; Instrument filenotify-tests

Remove what should be unnecessary calls to block_input

* src/xterm.c (handle_one_xevent): Do not block input inside.
This function is not reentrant and is always called with input
blocked.

Fix possible null pointer access

* src/term.c (Ftty__output_buffer_size): Handle case of
decode_tty_terminal returning NULL.

Merge from origin/emacs-28

50bb9ec84c ; * admin/admin.el (make-news-html-file): Fix typo.

; Merge from origin/emacs-28

The following commit was skipped:

e2c3ce2402 Sync with Tramp 2.5.3.2.  Don't merge with master

vc-do-command: Actually include "torsocks" in the command

* lisp/vc/vc-dispatcher.el (vc-do-command): When vc-tor is non-nil,
actually include "torsocks" in the command to be run (bug#57870).

image-dired: Display image on double click

* lisp/image/image-dired.el (image-dired-thumbnail-mode-map):
Display image on 'double-mouse-1'.

; image-dired: Fix last commit

* lisp/image/image-dired-external.el (image-dired-create-thumb-1): Fix
specification for format-spec.
* lisp/image/image-dired-external.el (image-dired-thumb-size):
Declare.

image-dired: Remove spurious message on C-<mouse-1>

* lisp/image/image-dired.el (image-dired-thumbnail-mode-map): Fix
spurious message about C-<down-mouse-1> being undefined.

; * lisp/image/image-dired.el: Use two spaces after period.

; * lisp/image/image-dired.el: Fix typo in last commit.

Increase image-dired-thumb-size to 128

* lisp/image/image-dired.el (image-dired-thumb-size): Increase default
to 128.

image-dired: Change some custom types to natnum

* lisp/image/image-dired.el (image-dired-thumb-size)
(image-dired-thumb-relief, image-dired-thumb-margin)
(image-dired-thumbs-per-row, image-dired-thumb-width)
(image-dired-thumb-height): Change :type to natnum.

Make `image-dired-thumb-(height|width)' obsolete

* lisp/image/image-dired.el (image-dired-thumb-width)
(image-dired-thumb-height): Make obsolete.
(image-dired-thumb-size): Clean up and improve docstring.
* lisp/image/image-dired-external.el (image-dired-thumb-size): Use
'image-dired-thumb-size' instead of above obsolete variables.
(image-dired-create-thumb-1): Support %s format specifier for size.
(image-dired-cmd-create-thumbnail-options): Document %s format
specifier.
(image-dired--thumb-size): Rename function from
'image-dired-thumb-size' and make old name into an obsolete alias.
Update all callers.

Simplify image-dired-thumbnail-storage customization

* lisp/image/image-dired.el (image-dired-dir): Improve docstring.
(image-dired-thumbnail-storage): Change default to `image-dired',
maintain `use-image-dired-dir' for backwards compatibility.
* lisp/image/image-dired-util.el (image-dired-thumb-name): Handle
above new default value.

; * admin/admin.el (make-news-html-file): Fix typo.

* lisp/image/image-dired.el: Bump version for Emacs 29.

Fix rare shaping problems with Urdu and Arabic

* src/composite.c (fill_gstring_body): Clear unused slots of the
gstring.  (Bug#50951)

Sync with Tramp 2.5.3.2.  Don't merge with master

* doc/misc/tramp.texi (Android shell setup): Rework.
(Frequently Asked Questions): Improve recommendations for speeding up.

* doc/misc/trampver.texi:
* lisp/net/trampver.el: Change version to "2.5.4-pre".

* lisp/net/tramp-adb.el (tramp-methods): Use "%d".
(tramp-adb-handle-directory-files-and-attributes): Fix "." and
".." in listing.
(tramp-adb-handle-file-attributes)
(tramp-adb-handle-directory-files-and-attributes)
(tramp-adb-handle-file-name-all-completions): Pipe "ls" output
through "cat", in order to avoid quoting special characters.
(tramp-adb-maybe-open-connection): Compute args from `tramp-login-args'.

* lisp/net/tramp-compat.el (tramp-compat-replace-regexp-in-region):
New defalias.

* lisp/net/tramp-gvfs.el (tramp-gvfs-do-copy-or-rename-file):
Adapt check for proper remote command.

* lisp/net/tramp.el (tramp-methods): Adapt docstring.
(tramp-handle-make-process): Check for adb device if indicated.
(tramp-get-remote-tmpdir): Cache result in temporary connection
property.

* test/lisp/net/tramp-tests.el  (tramp-test17-insert-directory)
(tramp-test22-file-times, tramp--test-utf8): Adapt tests.
(tramp--test-shell-file-name): Do not depend on `tramp--test-adb-p'.
(tramp-test46-unload): Ignore autoload functions in
`tramp-file-name' structure tests, since `tramp-file-name-handler'
is also autoloaded in Emacs 29.

Optimize tty display updates (bug#57727)

* src/dispnew.c (update_frame_1): Don'f flush if tty's
output_buffer_size is non-zero.
* src/sysdep.c (init_sys_modes): Setvbuf depending on the tty's
output_buffer_size.
* src/term.c (Ftty__set_output_buffer_size, Ftty__output_buffer_size):
Low-level interface for setting and retrieving a tty's output buffer
size.
(syms_of_term): Defsubr the new functions.
* src/termchar.h (struct tty_display_info): New member
output_buffer_size.
* stc/NEWS: Describe the change.

Fix recent filenotify-tests changes

* lisp/net/tramp-sh.el (tramp-sh-handle-file-notify-add-watch):
Use "-P".

* test/lisp/filenotify-tests.el (file-notify-test11-symlinks):
Adapt test.

Autoload string-join

* lisp/emacs-lisp/subr-x.el (string-join): Autoload since it's
being used more now.

Further improvements to admin/emake.

* admin/emake: Better parsing of script options.  Add a --quieter option,
which removes everything except errors.

Fix MPX focus tracking upon frame deletion

* src/xterm.c (x_free_frame_resources): Consider focus change
after.

; Update src/macuvs.h, forgotten in Unicode 15.0 commit.

Fix running spell-checking in remote buffers

* lisp/textmodes/ispell.el (ispell-with-safe-default-directory):
Don't use remote 'default-directory' when running the speller.
(Bug#57649)

Update Unicode support to Unicode version 15.0.0 (bug#57846)

* admin/unidata/BidiBrackets.txt
* admin/unidata/BidiMirroring.txt
* admin/unidata/Blocks.txt
* admin/unidata/IVD_Sequences.txt
* admin/unidata/IdnaMappingTable.txt
* admin/unidata/NormalizationTest.txt
* admin/unidata/PropertyValueAliases.txt
* admin/unidata/ScriptExtensions.txt
* admin/unidata/Scripts.txt
* admin/unidata/SpecialCasing.txt
* admin/unidata/UnicodeData.txt
* admin/unidata/confusables.txt
* admin/unidata/copyright.html
* admin/unidata/emoji-data.txt
* admin/unidata/emoji-sequences.txt
* admin/unidata/emoji-test.txt
* admin/unidata/emoji-zwj-sequences.txt
* test/manual/BidiCharacterTest.txt: Updated files from Unicode
15.0.

* admin/unidata/unidata-gen.el (unidata-file-alist): Add new ranges.

* lisp/international/fontset.el (script-representative-chars): Add
new scripts.
(otf-script-alist): Update from latest version.
(setup-default-fontset): Add new scripts.
* lisp/international/characters.el: Update syntax and category
tables for new characters and scripts.
(char-width-table): Update for changes in Unicode 15.0.

* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--failing-lines-part1)
(ucs-normalize-tests--failing-lines-part2): Update per the test
results.

* doc/lispref/nonascii.texi (Character Properties): Update Unicode
version number.

* etc/NEWS: Announce support for Unicode 15.0.

Merge from origin/emacs-28

320f0cac80 ; * etc/NEWS: Fix typo.
5dbe4fa64a Simplify regexp in make-news-html-file
069ffbda09 * admin/admin.el (make-news-html-file): Set id on correct ...
bcc84ac7fe Add version headlines to HTML NEWS export
5d227ae83e ; * etc/NEWS: Fix formatting.

# Conflicts:
# etc/NEWS

; * etc/NEWS: Fix typo.

Simplify regexp in make-news-html-file

* admin/admin.el (make-news-html-file): Simplify regexp.
Suggested by Mattias Engdegård <mattiase@acm.org>.

Various improvements to admin/emake.

* admin/emake: Return the status code of make when the build fails.
Filter the output of emake *clean.  Add three options --no-color
(useful for emake check for example), --no-check (useful for quicker
builds during development) and --no-fast.

Support XFCE in wallpaper.el

* lisp/image/wallpaper.el (wallpaper--default-commands)
(wallpaper-command): Support XFCE.  (Bug#57781)
Thanks to Thierry Volpiatto <thievol@posteo.net>.

Accept more wide function signatures in docstrings

* test/lisp/emacs-lisp/bytecomp-tests.el
("warn-wide-docstring-ignore-function-signature.el"): New test.
* lisp/emacs-lisp/bytecomp.el (byte-compile--wide-docstring-p):
Make regexp more allowing to silence warning.
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-ignore-function-signature.el:
New file.

image-dired: Add support for PDF files (Bug#26432)

* lisp/image/image-dired.el
(image-dired--file-name-regexp): New function.
(image-dired-display-thumbnail-original-image): Clean up.
(image-dired-display-image): Support visiting PDF files.
* lisp/image/image-dired-dired.el
(image-dired-dired-toggle-marked-thumbs):
* lisp/image/image-dired.el (image-dired-get-thumbnail-image)
(image-dired-show-all-from-dir): Use above new function instead of
'image-file-name-regexp'.

image-dired: Print command when debugging

* lisp/image/image-dired-external.el (image-dired-create-thumb-1):
Display command and arguments when debugging.
* lisp/image/image-dired-util.el (image-dired-debug): Rename from
'image-dired-debug-message'.

; * lisp/progmodes/cperl-mode.el: Fix typo.

; * lisp/progmodes/cperl-mode.el: Fix Author header.

Delete mystery code from cperl-mode.el

* lisp/progmodes/cperl-mode.el: Delete commented out code referring to
some 'edit-var-mode-alist' that we don't think is used for anything.

Delete some commented out code in cperl-mode.el

The differences between this and the existing `cperl-ps-print-init'
are that some faces had been moved from italic to bold or vice versa,
and that there were some obsolete or non-existent face names
mentioned.  So there is no point to keeping it given that it's been
commented out since 1999.

* lisp/progmodes/cperl-mode.el: Delete code commented out since 1999:
a slightly different, duplicate definition of `cperl-ps-print-init'.

Fix last occurrence of `font-lock-reference-face`

Well... except for CC-mode.

* lisp/cedet/semantic/grammar.el (semantic-grammar-mode-keywords-1):
Redirect reference to obsolete `font-lock-reference-face` to
`font-lock-constant-face`.

* admin/admin.el (make-news-html-file): Set id on correct tag.

Add version headlines to HTML NEWS export

This allows linking to, e.g. "NEWS.28.html#28.1" to go directly to
those release notes.
* admin/admin.el (admin--org-export-headers-format)
(make-news-html-file): Add XX.Y version headlines with an HTML anchor.

; * etc/NEWS: Fix formatting.

* lisp/subr.el (list-of-strings-p): Declare pure and error-free

* lisp/outline.el: Optimize performance of S-TAB (bug#57813)

(outline-hide-subtree): Don't call outline--insert-close-button, because
it's handled by outline--fix-up-all-buttons called from outline-flag-region.
(outline-show-subtree): Don't call outline--insert-open-button, same reason.
(outline--fix-up-all-buttons): Check invisible outlines explicitly instead of
using slow outline--cycle-state.

Enable `dont-follow' for inotify file notifications

* doc/lispref/os.texi (File Notifications): Symlinks aren't followed.

* lisp/filenotify.el (file-notify--add-watch-inotify):
Add `dont-follow' flag.

* lisp/net/tramp.el (tramp-handle-file-notify-rm-watch):
Suppress errors when reading process output.

* test/lisp/filenotify-tests.el (file-notify-test11-symlinks)
(file-notify-test11-symlinks-remote): New tests.

; Add myself as image-dired maintainer

* lisp/image/image-dired-dired.el:
* lisp/image/image-dired-external.el:
* lisp/image/image-dired-tags.el:
* lisp/image/image-dired-util.el:
* lisp/image/image-dired.el: Add myself as maintainer.

Use substitute-command-keys in some vc messages

* lisp/vc/vc-dispatcher.el (vc-start-logentry):
* lisp/vc/vc.el (vc-steal-lock): Use substitute-command-keys.

; Merge from origin/emacs-28

The following commit was skipped:

562c196099 ; * etc/NEWS: Backport fixes from master.

Merge from origin/emacs-28

f232d989fd Improve HTML export of NEWS file
397890ba77 Delete "etc/NEWS*.html" from .gitignore
70ca5f6524 ; * etc/NEWS: Fix typos.
19de241a7d Recommend NonGNU ELPA over MELPA
f25f9dbf30 Minor doc fixes in picture.el
520b041b54 * lisp/textmodes/page-ext.el: Improve Commentary.

# Conflicts:
# etc/NEWS

; * etc/NEWS: Backport fixes from master.

Don't merge to master.

Improve HTML export of NEWS file

* admin/admin.el (admin--org-export-headers-format)
(admin--org-html-postamble): New variables.
(admin--require-external-package): New function.
(make-news-html-file): Improve HTML export.

; * etc/NEWS.28: Fix merge of NEWS.28.

Add command to delete temporary markers in NEWS

* lisp/textmodes/emacs-news-mode.el
(emacs-news-delete-temporary-markers): New command.
* admin/make-tarball.txt: Update instructions.

cc-fonts.el: Eliminate an Emacs compiler warning introduced yesterday.

* lisp/progmodes/cc-fonts.el (top level): Introduce a cc-bytecomp-defvar for
font-lock-reference-face.

Faster and more robust list-of-strings-p

* lisp/subr.el (list-of-strings-p): Speed up by a factor 4 (approx.)
and don't crash on dotted lists.
* test/lisp/subr-tests.el (test-list-of-strings-p): Extend test.

Delete "etc/NEWS*.html" from .gitignore

We actually do want to see it when preparing a release, so that we
don't include it in a tarball by mistake.
* .gitignore: Don't ignore "etc/NEWS*.html".

; * etc/NEWS: Fix typos.

; * etc/NEWS: Fix typos.