Beef up the Emacs string utility set a bit

* doc/lispref/strings.texi (Modifying Strings): Document them.
* lisp/emacs-lisp/shortdoc.el (string): Add examples.

* lisp/emacs-lisp/subr-x.el (string-clean-whitespace)
(string-fill, string-limit, string-lines, slice-string): New
functions.

Fix frame creation on X when tool bar is disabled

* src/xterm.c (handle_one_xevent): Restrict the fix for bug#44002
to situations when we are asked by the WM to create a window with
bogus 1x1 dimensions.  (Bug#44794)

Fix permission problem in Tramp's copy-file

* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-directly):
Take care of PRESERVE-UID-GID.

; * src/nsfns.m (all_nonzero_ascii): comment correction

Drop XEmacs support for EDE ELisp projects

* lisp/cedet/ede/proj-elisp.el (ede-proj-target-elisp): Remove
XEmacs support.
(ede-xemacs-compiler): Make obsolete.

Fix problem with entering Gnus groups when Gnus isn't running

* lisp/gnus/gnus-sum.el (gnus-update-summary-mark-positions):
Don't bug out when Gnus isn't running (bug#45330).

Make python-mode fontify more assignment statements

* lisp/progmodes/python.el (python-font-lock-assignment-matcher): New
function to match assignment statements.
(python-rx): Add `assignment-target' and `grouped-assignment-target'.
(python-font-lock-keywords-maximum-decoration): Add new matchers
(bug#45341).

Generic-ify xref-location-column

* lisp/progmodes/xref.el (xref-location-column):
Create a generic from xref-file-location-column, to use in the
common rendering code (bug#36967).
(xref--insert-xrefs): Update accordingly.

* test/lisp/progmodes/xref-tests.el
(xref-matches-in-directory-finds-two-matches-on-the-same-line)
(xref-matches-in-directory-finds-an-empty-line-regexp-match):
Ditto.

De-duplicate lines in Xref buffers

* lisp/progmodes/xref.el (xref--insert-xrefs):
Render matches coming from the same line together (bug#36967).
(xref--item-at-point): Account for the above.

Unbreak build after commit 1a0a11f7d2d1dbecb9f754b1e129d50e489058e6.

The commit only changed a comment in 'struct buffer', so the portable
dumper doesn't need to be adapted.

* src/pdumper.c (dump_buffer): Update hash for 'struct buffer'.

Fix image cache lookup

* src/image.c (lookup_image): ignore_colors should be false as we want
to search for images with matching colors.

Remove unnecessary string conversion

* src/nsfns.m (ns_set_represented_filename): NSString can load List
strings directly now.

* lisp/simple.el (goto-line-read-args): Use number-at-point (bug#45199)

* lisp/subr.el (goto-char--read-natnum-interactive): Add the value of
point to the end of default values, and move function slightly higher.

Improve make-process in Tramp

* doc/misc/tramp.texi (Remote processes): Remove INSIDE_EMACS
restriction.
(Frequently Asked Questions, External packages): Add indices.

* etc/NEWS: 'start-process-shell-command' and
'start-file-process-shell-command' do not support the old calling
conventions any longer.

* lisp/subr.el (start-process-shell-command)
(start-file-process-shell-command): Remove old calling conventions.

* lisp/net/tramp-compat.el (remote-file-error): Remove, it isn't
necessary.

* lisp/net/tramp.el (tramp-handle-make-process): Remove special shell
handling.  Support environment variables.

* test/lisp/net/tramp-tests.el
(tramp--test--deftest-direct-async-process): Skip for mock method.
(tramp--test-async-shell-command): Suppress `shell-command-sentinel'.
(tramp-test32-shell-command, tramp-test33-environment-variables):
Adapt tests.
(tramp-test32-shell-command-direct-async)
(tramp-test33-environment-variables-direct-async): New tests.

Inhibit buffer hooks in temporary buffers

Give get-buffer-create an optional argument to inhibit buffer hooks
in internal or temporary buffers for efficiency (bug#34765).

* etc/NEWS: Announce new parameter of get-buffer-create and
generate-new-buffer, and that with-temp-buffer and with-temp-file
now inhibit buffer hooks.

* doc/lispref/buffers.texi (Buffer Names): Fix typo.
(Creating Buffers): Document new parameter of get-buffer-create and
generate-new-buffer.
(Buffer List, Killing Buffers): Document when buffer hooks are
inhibited.
(Current Buffer):
* doc/lispref/files.texi (Writing to Files): Document that
with-temp-buffer and with-temp-file inhibit buffer hooks.
* doc/lispref/internals.texi (Buffer Internals): Document
inhibit_buffer_hooks flag.  Remove stale comment.
* doc/misc/gnus-faq.texi (FAQ 5-8):
* lisp/simple.el (shell-command-on-region): Fix indentation.

* lisp/files.el (kill-buffer-hook): Document when hook is inhibited.
(create-file-buffer):
* lisp/gnus/gnus-uu.el (gnus-uu-unshar-article):
* lisp/international/mule.el (load-with-code-conversion):
* lisp/mh-e/mh-xface.el (mh-x-image-url-fetch-image):
* lisp/net/imap.el (imap-open):
* lisp/net/mailcap.el (mailcap-maybe-eval):
* lisp/progmodes/flymake-proc.el
(flymake-proc--read-file-to-temp-buffer)
(flymake-proc--copy-buffer-to-temp-buffer): Simplify.

* lisp/subr.el (generate-new-buffer): Forward new optional argument
to inhibit buffer hooks to get-buffer-create.
(with-temp-file, with-temp-buffer, with-output-to-string):
* lisp/json.el (json-encode-string): Inhibit buffer hooks in buffer
used.

* src/buffer.c (run_buffer_list_update_hook): New helper function.
(Fget_buffer_create): Use it.  Add optional argument to set
inhibit_buffer_hooks flag instead of comparing the buffer name to
Vcode_conversion_workbuf_name.  All callers changed.
(Fmake_indirect_buffer, Frename_buffer, Fbury_buffer_internal)
(record_buffer): Use run_buffer_list_update_hook.
(Fkill_buffer): Document when buffer hooks are inhibited.  Use
run_buffer_list_update_hook.
(init_buffer_once): Inhibit buffer hooks in Vprin1_to_string_buffer.
(Vkill_buffer_query_functions, Vbuffer_list_update_hook): Document
when hooks are inhibited.
* src/buffer.h (struct buffer): Update inhibit_buffer_hooks
commentary.
* src/coding.h (Vcode_conversion_workbuf_name):
* src/coding.c (Vcode_conversion_workbuf_name): Make static again
since it is no longer needed in src/buffer.c.
(code_conversion_restore, code_conversion_save, syms_of_coding):
Prefer boolean over integer constants.
* src/fileio.c (Finsert_file_contents): Inhibit buffer hooks in
" *code-converting-work*" buffer.
* src/window.c (Fselect_window): Fix grammar.  Mention
window-selection-change-functions alongside buffer-list-update-hook.

* test/src/buffer-tests.el: Fix requires.
(buffer-tests-inhibit-buffer-hooks): New test.

image-cache-size improvements

Implement for non-Cairo X11 and NS.  Count masks as well, and
XImage objects on X11.

* src/image.c (image_size_in_bytes): New.
(image_frame_cache_size): Use image_size_in_bytes.
* src/nsterm.h:
* src/nsimage.m (ns_image_size_in_bytes, [EmacsImage sizeInBytes]):
New function and method.
* src/w32gui.h:
* src/w32term.c (w32_image_size): Update signature.

Fix default value of gnus-registry-register-all: should be t

* lisp/gnus/gnus-registry.el (gnus-registry-register-all): This was
meant to default to t; only an oversight during code review left it as
nil.

Jamie Beardslee <beardsleejamie@gmail.com>

* lisp/progmodes/project.el (project-execute-extended-command):
New command.
(project-prefix-map): Binding for it.

Copyright-paperwork-exempt: yes

* lisp/image-mode.el: Use one timer and lock for slow remote calls (bug#45256)

* lisp/image-mode.el (image-auto-resize-timer): New variable.
(image--window-state-change): Cancel previous timer and
remember new timer in image-auto-resize-timer.
(image--window-state-change): New variable.
(image-fit-to-window): When image-fit-to-window-lock is nil,
call image-toggle-display-image ignoring 'remote-file-error'.

No need to set isearch-input-method-function in isearch-transient-input-method

Convert apropos-internal from C to Lisp (Bug#44529)

This runs insignificantly faster in C, and is already fast enough on
reasonably modern hardware.  We might as well lift it to Lisp.
This benchmark can be used to verify:

  (benchmark-run 10 (apropos-command "test"))
  => (0.12032415399999999 2 0.014772391999999995) ; C
  => (0.13513192100000002 2 0.017216643000000004) ; Lisp

* lisp/subr.el (apropos-internal): New defun, converted from C.
* src/keymap.c (Fapropos_internal): Remove defun.
(apropos_accum): Remove function.
(apropos_predicate, apropos_accumulate): Remove variables.
(syms_of_keymap): Remove defsubr for Fapropos_internal, and
definitions of the above variables.
* test/src/keymap-tests.el (keymap-apropos-internal)
(keymap-apropos-internal/predicate): Move tests from here...
* test/lisp/subr-tests.el (apropos-apropos-internal)
(apropos-apropos-internal/predicate): ...to here.

Shorten some over-wide docstrings in functions and macros

* lisp/allout-widgets.el (allout-widgets-tally-string):
* lisp/array.el (array-mode):
* lisp/calc/calc-units.el (calc-spn):
* lisp/cedet/ede/generic.el (ede-generic-new-autoloader):
* lisp/cedet/semantic/analyze.el (semantic-analyze-find-tag-sequence-default)
(semantic-analyze-find-tag-sequence):
* lisp/cedet/semantic/bovine/c.el (semantic-c-evaluate-symbol-for-hideif):
* lisp/cedet/semantic/bovine/make.el (semantic-lex-make-command):
* lisp/cedet/semantic/db-typecache.el (semanticdb-typecache-include-tags):
* lisp/cedet/semantic/doc.el (semantic-documentation-for-tag):
* lisp/cedet/semantic/tag-ls.el (semantic--tag-attribute-similar-p):
* lisp/emacs-lisp/advice.el (ad-map-arglists):
* lisp/emacs-lisp/bytecomp.el (byte-constant2)
(byte-save-restriction, byte-catch-OBSOLETE, byte-unwind-protect):
* lisp/emacs-lisp/cl-generic.el (cl-generic-combine-methods):
* lisp/emacs-lisp/seq.el (seq-partition, seq-set-equal-p)
(seq-filter):
* lisp/faces.el (face-attribute-specified-or, face-equal):
* lisp/info.el (Info-prev-reference-or-link)
(Info-next-reference-or-link):
* lisp/isearch.el (with-isearch-suspended):
* lisp/kmacro.el (kmacro-step-edit-macro, kmacro-set-counter):
* lisp/org/org-agenda.el (org-agenda-filter-by-category):
* lisp/ses.el (ses-cell-symbol):
* lisp/w32-fns.el (w32-shell-dos-semantics): Shorten doc strings to
not exceed 80-column limits.  (Bug#44858)

Shorten over-wide docstrings in variables

* lisp/cedet/semantic/util-modes.el (semantic-highlight-func-popup-menu):
* lisp/emacs-lisp/elint.el (elint-top-form-logged):
* lisp/erc/erc-dcc.el (erc-dcc-list):
* lisp/expand.el (expand-pos):
* lisp/font-lock.el (cpp-font-lock-keywords-source-depth):
* lisp/gnus/gnus-sum.el (gnus-sort-gathered-threads-function):
* lisp/gnus/message.el (message-cite-style-thunderbird):
* lisp/gnus/nnmh.el (nnmh-be-safe):
* lisp/gnus/nntp.el (nntp-open-telnet-envuser):
* lisp/international/mule-cmds.el (current-transient-input-method):
* lisp/net/tramp.el (tramp-file-name-structure):
* lisp/org/ob-R.el (org-babel-R-write-object-command):
* lisp/org/org-attach.el (org-attach-after-change-hook):
* lisp/org/org.el (org-stamp-time-of-day-regexp):
* lisp/progmodes/elisp-mode.el (elisp-xref-find-def-functions):
* lisp/progmodes/ruby-mode.el (ruby-block-mid-re):
* lisp/progmodes/verilog-mode.el (verilog-cache-enabled):
* lisp/term.el (term-scroll-end):
* lisp/textmodes/table.el (table-command-remap-alist)
(table-inhibit-auto-fill-paragraph, table-command-remap-alist):
* lisp/vc/ediff-diff.el (ediff-ignore-similar-regions):
* lisp/vc/ediff-wind.el (ediff-mouse-pixel-threshold):
* lisp/vc/smerge-mode.el (smerge-refine-ignore-whitespace):
* lisp/vc/vc.el (vc-log-short-style):
* lisp/view.el (view-exit-action): Shorten doc strings to not exceed
80-column limits.  (Bug#44858)

Shorten over-wide docstrings in defcustoms

* lisp/calc/calc.el (calc-embedded-announce-formula-alist)
(calc-embedded-open-formula, calc-embedded-close-formula)
(calc-matrix-mode):
* lisp/cedet/semantic/imenu.el (semantic-imenu-sort-bucket-function):
* lisp/emacs-lisp/find-func.el (find-feature-regexp):
* lisp/emulation/cua-base.el (cua-paste-pop-rotate-temporarily):
* lisp/emulation/viper-init.el (viper-fast-keyseq-timeout)
(viper-related-files-and-buffers-ring):
* lisp/emulation/viper-keym.el (viper-want-ctl-h-help):
* lisp/gnus/gnus-art.el (gnus-article-banner-alist):
* lisp/gnus/gnus-group.el (gnus-keep-same-level):
* lisp/gnus/gnus-score.el (gnus-adaptive-word-length-limit):
* lisp/gnus/gnus-sum.el (gnus-inhibit-user-auto-expire):
* lisp/gnus/gnus-uu.el (gnus-uu-ignore-files-by-type)
(gnus-uu-do-not-unpack-archives)
(gnus-uu-unmark-articles-not-decoded)
(gnus-uu-correct-stripped-uucode, gnus-uu-save-in-digest)
(gnus-uu-post-include-before-composing):
* lisp/gnus/gnus.el (gnus-use-long-file-name)
(gnus-install-group-spam-parameters):
* lisp/gnus/message.el (message-cite-style):
* lisp/gnus/nnmail.el
(nnmail-split-fancy-with-parent-ignore-groups)
(nnmail-cache-ignore-groups):
* lisp/ido.el (ido-rewrite-file-prompt-functions):
* lisp/mail/feedmail.el (feedmail-fiddle-plex-user-list)
(feedmail-spray-address-fiddle-plex-list):
* lisp/mh-e/mh-e.el (mh-annotate-msg-hook):
* lisp/net/imap.el (imap-process-connection-type):
* lisp/net/rcirc.el (rcirc-omit-threshold):
* lisp/net/tramp-sh.el (tramp-copy-size-limit):
* lisp/nxml/nxml-mode.el (nxml-default-buffer-file-coding-system):
* lisp/obsolete/landmark.el (landmark-max-stall-time):
* lisp/obsolete/tls.el (tls-checktrust):
* lisp/org/org-indent.el
(org-indent-mode-turns-off-org-adapt-indentation)
(org-indent-mode-turns-on-hiding-stars):
* lisp/org/org-protocol.el (org-protocol-project-alist):
* lisp/progmodes/cc-vars.el (c-doc-comment-style):
* lisp/progmodes/cperl-mode.el (cperl-indent-subs-specially):
* lisp/progmodes/flymake-proc.el (flymake-proc-allowed-file-name-masks):
* lisp/progmodes/hideif.el (hide-ifdef-expand-reinclusion-protection):
* lisp/simple.el (minibuffer-history-case-insensitive-variables):
* lisp/tab-bar.el (tab-bar-close-last-tab-choice):
* lisp/textmodes/reftex-vars.el
(reftex-special-environment-functions):
* lisp/vc/ediff-init.el (ediff-startup-hook, ediff-cleanup-hook)
(ediff-metachars):
* lisp/vc/ediff-merg.el (ediff-show-clashes-only):
* lisp/vc/ediff-mult.el (ediff-default-filtering-regexp): Shorten doc
strings to not exceed 80-column limits.  (Bug#44858)

Correct units and spacing in memory-report

* lisp/emacs-lisp/memory-report.el (memory-report--format):
Use IEC unit prefixes and a space before.

Set indent-tabs-mode for c-mode in .dir-locals.el

* .dir-locals.el (c-mode): Enforce existing indent-tabs-mode
policy.  (Bug#34765)

; Revert unintended change.

Fix over-wide doc strings

* lisp/vc/ediff-init.el (ediff-before-flag-bol)
(ediff-after-flag-eol, ediff-before-flag-mol):
* lisp/org/org-ctags.el (org-ctags-open-link-functions):
* lisp/mail/feedmail.el (feedmail-sendmail-f-doesnt-sell-me-out):
* lisp/language/ethio-util.el (ethio-use-three-dot-question)
(ethio-quote-vowel-always, ethio-W-sixth-always):
* lisp/gnus/nnvirtual.el (nnvirtual-mapping-table)
(nnvirtual-mapping-offsets, nnvirtual-mapping-reads)
(nnvirtual-mapping-marks, nnvirtual-info-installed):
* lisp/gnus/gnus.el (charset):
* lisp/gnus/deuglify.el (gnus-outlook-deuglify-unwrap-stop-chars)
(gnus-outlook-deuglify-no-wrap-chars)
(gnus-outlook-deuglify-attrib-cut-regexp): Fix doc strings to not
exceed 80-column limits.  (Bug#44858)

bibtex-mode: Permit user-defined schemes for sorting entries.

* lisp/textmodes/bibtex.el (bibtex-maintain-sorted-entries):
New allowed value (INDEX-FUN PREDICATE).
(bibtex-entry-index, bibtex-lessp): Use it.
(bibtex-init-sort): Rename from bibtex-init-sort-entry-class-alist.

* lisp/emacs-lisp/package.el (package-quickstart-refresh): Fix last change

Actually allow byte-compiling the file.
Reported by Basil L. Contovounesios <contovob@tcd.ie>.

; Fix grammar in recent change to internals.texi

; Fix @pxref in last change to flymake.texi

; Merge from origin/emacs-27

The following commit was skipped:

37eba74d60 (tag: emacs-27.1.90, origin/emacs-27) Update files for the...

Merge from origin/emacs-27

48b9c47805 Minor fixes in authors.el and in tarball-making instructions
d7a4ceaa1e ; Add a new item to TODO
64fe805b19 Improve documentation of 'query-replace'
7cacf5da47 Update to Org 9.4.3

# Conflicts:
# admin/authors.el

Document that flymake-diag-region saves match data

The typical use of this function (which is parsing compiler diagnostic
messages), lends itself too easily to one the problems in bug#29193.
Make it a friendlier API.

* doc/misc/flymake.texi (Flymake utility functions): Document that
flymake-diag-region saves match data.

* lisp/progmodes/flymake.el (flymake-diag-region): Document that
this saves match data.

Update files for the 27.1.90 pretest

* README:
* configure.ac:
* nt/README.W32:
* msdos/sed2v2.inp: Bump Emacs version to 27.1.90.
* lisp/ldefs-boot.el: Update from loaddefs.el

* lisp/emacs-lisp/package.el: Byte compile the quickstart file

Earlier tests had found problems when byte-compiling the file,
but later investigations indicated the problem was not
directly related.  The performance difference is appreciable.

(package-quickstart-refresh): Byte compile the file.
(package-activate-all): Load byte-compiled version if available.
(package--quickstart-maybe-refresh): Delete the byte-compiled file as well.

Minor fixes in authors.el and in tarball-making instructions

* admin/authors.el (authors): Make the error message more helpful.
(authors-ignored-files, authors-renamed-files-alist): Update.

* lisp/progmodes/which-func.el (which-func-update): Bind `non-essential`

Follow good regexp practice

These were found by relint 1.19.

* lisp/help-fns.el (help-fns--first-release): Use string-end instead
of line-end when matching a file name.
* lisp/org/ob-core.el (org-babel--string-to-number): Put hyphen last
in alternative.
* lisp/org/org-agenda.el (org-agenda-filter): Escape '+' correctly.

* lisp/net/tramp.el (tramp-handle-make-process): Handle shell commands.

Save match data in flymake-diag-region (bug#29193)

* lisp/progmodes/flymake.el (flymake-diag-region): Move
save-match-data up.

Fix previous frame-focus server.el change

* lisp/server.el (server-execute): Always give Emacs focus,
whether we open a new frame or not.

Fix regexp in IMAP search-string preparation

* lisp/gnus/gnus-search.el (gnus-search-run-search): This was failing
to catch all of X-GM-RAW.

flymake-diag-region: Fix the recent test breakage

* lisp/progmodes/flymake.el (flymake-diag-region):
Make sure to save the match data (bug#29193).

* lisp/org/org-refile.el (org-copy): Fix missing obsoletion version

Some minor Tramp changes

* doc/lispref/os.texi (Timers): Speak about `remote-file-error'.

* doc/misc/tramp.texi (Frequently Asked Questions): Speak about
`remote-file-error'.
(External packages): New subsection "Timers".

* lisp/net/tramp-adb.el (tramp-adb-handle-make-process):
* lisp/net/tramp-sh.el (tramp-sh-handle-make-process): Adapt error
function.  Handle coding.

* lisp/net/tramp.el (tramp-handle-make-process): Adapt error function.

Remove incorrect comment from erc-goodies.el

* lisp/erc/erc-goodies.el (erc-move-to-prompt-setup): Remove incorrect
comment; the XEmacs compat code has been removed.

Fix my two most common causes of all windows/frames redisplay

* src/buffer.c (Fkill_all_local_variables): Only redisplay the buffer.
* src/window.c (set_window_scroll_bars): Only redisplay the window.

Make "Invalid modifier in string" ordinary invalid-read-syntax error

* src/lread.ec (read1): Raise "Invalid modifier in string" error as
  `invalid-read-syntax'.  This fixes raise of unhandled error in
  `elisp--local-variables'

; Add a new item to TODO

* etc/TODO (redisplay): Add an item for making redisplay cycle
more scalable when there are many frames.

Fix fallback use of write-file in ido-mode

* lisp/ido.el (ido-file-internal): Make `write-file' respect the
directory we've navigated to (bug#28513).

Ensure that byte compilation works for relative files (Bug#45287).

* lisp/emacs-lisp/bytecomp.el (byte-compile-file): Don’t fail if
target filename doesn’t contain a directory name.

* test/lisp/emacs-lisp/bytecomp-tests.el
(bytecomp-tests--target-file-no-directory): New unit test.

Default the init file to init.el, not init

* lisp/startup.el (startup--load-user-init-file): Make the default
init file be "init.el", not "init" (bug#45197).

Fix resetting of gnus-pick-line-number

* lisp/gnus/gnus-sum.el (gnus-summary-read-group-1): Move setting
gnus-pick-line-number from here (bug#45269)...
(gnus-summary-prepare): To here.  This ensures that the number is
reset when regenerating the buffer, for instance when limiting it.

Don't show minibuffer keybindings for suggestions in read-extended-command

* lisp/simple.el (read-extended-command): Use 'affixation-function'
instead of 'annotation-function'.  (Bug#45035)
(read-extended-command--affixation): New function created from
'read-extended-command--annotation'.

Give affixation-function higher priority over annotation-function (bug#45234)

* doc/lispref/minibuf.texi (Completion Variables)
(Programmed Completion): Describe precedence rules
of affixation-function and annotation-function.

* lisp/minibuffer.el (completion-metadata)
(completion-extra-properties): Describe precedence rules
of affixation-function and annotation-function.
(minibuffer-completion-help): First try to apply
affixation-function, if there is no such function,
try annotation-function.

Improve documentation of 'query-replace'

* doc/emacs/search.texi (Query Replace): Add 'E' to the list of
characters one can type at 'query-replace' prompt.  (Bug#45273)

Update to Org 9.4.3

Fix #45259

CPerl-mode: don't treat <<>> as starting a here-doc

* lisp/progmodes/cperl-mode.el (cperl-find-pods-heres): Detect
the "<<>>" operator (Bug#42455).

* test/lisp/progmodes/cperl-mode-tests.el
(cperl-test-bug-45255): Verify that <<>> does not start a
HERE-doc.

Update short docs in cperl-mode

* lisp/progmodes/cperl-mode.el (cperl-short-docs):
Update with some missing entries.  (Bug#45254)

; * lisp/play/5x5.el: Fix my last change.

(flymake-diag-region): Fall back to (end-of-thing 'symbol)

* lisp/progmodes/flymake.el (flymake-diag-region):
Fall back to (end-of-thing 'symbol) (bug#29193).

Fix C-n/C-p when a line starts with an image

* src/xdisp.c (move_it_to): Handle the case where the second call
to move_it_in_display_line_to under MOVE_TO_Y takes us farther
from TO_CHARPOS than the first call.  This fixes values returned
by pos-visible-in-window-p and posn-at-point when the screen line
starts with invisible text followed by an image.  (Bug#9092)

; Merge from origin/emacs-27

The following commit was skipped:

ee6c702e18 (origin/emacs-27) Fix error with fn key in NS port (bug#44...

Merge from origin/emacs-27

668f0a7f84 Fix point location when completing in gdb-mi.el
2dbc95063b Update to Org 9.4.2
f22856a5c5 Update to Org 9.4.1

# Conflicts:
# doc/misc/org.texi
# lisp/org/ob-core.el
# lisp/org/ob-ruby.el
# lisp/org/ob-screen.el
# lisp/org/ol-gnus.el
# lisp/org/ol.el
# lisp/org/org.el

; Merge from origin/emacs-27

The following commit was skipped:

6aa9fe3e1b Fix crash in ns_mouse_position (bug#44313)

Merge from origin/emacs-27

62a6934af9 Fix crash when using XRender and restoring image from X (b...
de032d41c6 Bind k to image-kill-buffer in doc-view-mode-map.

Fix setting breakpoints in "M-x gdb" when a source file is missing

* lisp/progmodes/gdb-mi.el (gdb-get-location): Fix control flow
logic when "fullname" is not found.  Unquote and unescape the full
file name by calling gdb-mi--c-string-from-string.  FLAG is a
string, not a character.  (Bug#15051)

CC Mode: Optimize for scrolling large buffers containing few braces

This fixes bug #25706.  It particularly pertains to .h files which contain
only macro definitions.  Many of these files are to be found, for example, in
the driver sections of the Linux kernel.

* lisp/progmodes/cc-engine.el (c-beginning-of-statement-1, c-on-identifier)
(c-syntactic-skip-backward, c-find-decl-prefix-search, c-find-decl-spots)
(c-forward-name, c-back-over-list-of-member-inits)
(c-back-over-member-initializers, c-looking-at-inexpr-block)
(c-guess-basic-syntax): Give search limits to, or amend existing ones to
c-backward-syntactic-ws, c-forward-syntactic-ws, c-backward-token-2,
c-beginning-of-statement-1.
(c-determine-limit-no-macro): New function.
(c-determine-limit-get-base): Remove unlimted invocation of
c-backward-syntactic-ws.
(c-determine-limit): Exclude movement between two different macros.  Use new
function c-determine-limit-no-macro.
(c-back-over-list-of-member-inits): New parameter `limit'.

* lisp/progmodes/cc-fonts.el (c-font-lock-complex-decl-prepare)
(c-font-lock-declarations, c-font-lock-c++-using): Give search limits to, or
amend existing ones to c-backward-syntactic-ws, c-beginning-of-decl-1.

* lisp/progmodes/cc-mode.el (c-unfind-coalesced-tokens, c-before-changer)
(c-fl-decl-end): Give search limits to, or amend existing ones to
c-backward-syntactic-ws, c-forward-syntactic-ws, skip-chars-backward,
skip-chars-forward.

Revert last change in tramp-maybe-open-connection)

* lisp/net/tramp-sh.el (tramp-maybe-open-connection): Revert last change,
it causes trouble.

Fix electric pairs in rst-mode

* lisp/textmodes/rst.el (rst-mode-syntax-table): Mark pairs in the
syntax table (bug#23413).
(rst-mode): Instead of setting electric-pair-pairs.

Bind current-minibuffer-command to this-command

* src/callint.c (Fcall_interactively): Bind
current-minibuffer-command to this-command, as documented (bug#45177).

* doc/lispref/errors.texi (Standard Errors): Fix xref.

Though I am not sure "report a bug" is helpful.

* doc/emacs/indent.texi (Indent Convenience): Fix use of @xref.

Tiny fix for lispref/variables.texi

* doc/lispref/variables.texi (Converting to Lexical Binding):
@strong{Note...} produces a spurious cross-reference in Info;
reword to avoid that.

* lisp/emacs-lisp/gv.el (error): Allow it as a place

Optimise c-font-lock-<>-arglists, particularly for buffers with few <..> pairs

* lisp/progmodes/cc-fonts.el (c-font-lock-<>-arglists): In place of a regexp
search for a complicated and slow regexp, search simply for "<" ouside of
literals together with add hoc testing of other requirements for a <...>
match.

* lisp/progmodes/cc-langs.el (c-nonsymbol-key): New c-lang-defvar from the
c-lang-const.

Fix error with fn key in NS port (bug#44533)

* src/nsterm.m ([EmacsView keyDown:]): Move the correction for fn key
handling to before the modifiers are calculated.

(cherry picked from commit 7970610d48701a949ce443c94c71eac47d044197)

Optimise c-parse-state for large buffers with few (if any) braces.

* lisp/progmodes/cc-engine (c-get-fallback-scan-pos): Search a maximum of
50,000 characters back for the two BODs.  Return nil if we dont' find them.
(c-parse-state-get-strategy): For strategy `forward', always use the position
`good-pos' for `start-point', even when there's a change of current macro.
Deal with a possible return value of nil from c-get-fallback-scan-pos (as
above).
(c-invalidate-state-cache-1): For `c-state-cache-good-pos', instead of
sometimes using the minimum scan pos (leading to extensive scanning of the
entire buffer) use a point close to `here'.

Add some admin/emake comments

Make the emake error messages red

* admin/emake: Colorize error messages.

Add 'remote-file-error' for Tramp

* doc/lispref/errors.texi (Standard Errors): Add 'remote-file-error'.

* etc/NEWS: Mention 'remote-file-error'.

* lisp/net/ange-ftp.el (ftp-error): Add error condition
`remote-file-error'.

* lisp/net/tramp-cmds.el (tramp-cleanup-all-connections): Do not set
`tramp-locked'.

* lisp/net/tramp-compat.el (remote-file-error): Define if it
doesn't exist.

* lisp/net/tramp-sh.el (tramp-timeout-session): Check for "locked"
property.
(tramp-maybe-open-connection): Simplify.

* lisp/net/tramp.el (tramp-locked, tramp-locker): Remove them.
(tramp-file-name-handler): Do not set them.
(with-tramp-locked-connection): New defmacro.
(tramp-accept-process-output, tramp-send-string): Use it.

* src/fileio.c (Qremote_file_error): New error symbol.

* test/lisp/net/tramp-tests.el (tramp-test43-asynchronous-requests):
Adapt test.  Remove :unstable tag.

Improve accuracy of scrolling commands

* src/xdisp.c (move_it_vertically_backward): Don't rely on
line_bottom_y for accurate calculation of the next screen line's Y
coordinate: it doesn't work when the current screen line was not
yet traversed.  Instead, record the previous Y coordinate and
reseat there if overshoot is detected.
* src/window.c (window_scroll_pixel_based): Calculate the new
window-start point more accurately when screen lines have uneven
height.  (Bug#8355)

Make XEmacs entry in the FAQ more contemporary

* doc/misc/efaq.texi (Difference between Emacs and XEmacs): Make
XEmacs entry in the FAQ more contemporary.  Remove part about re-using
XEmacs code; this is not likely to be relevant these days and in any
case is not a frequently asked question.  (Bug#45235)

Fix point location when completing in gdb-mi.el

* lisp/progmodes/gdb-mi.el (def-gdb-auto-update-handler): Don't
force window-start position, so that redisplay doesn't move point
when popping completion window below the GUD one.  (Bug#45052)

Fix logic of gnus-search-imap-handle-date

* lisp/gnus/gnus-search.el (gnus-search-imap-handle-date): Just
rewrite this whole ridiculous function.

* lisp/play/5x5.el: Fix typo.  Remove redundant :group args.

* etc/emacs.service:

* etc/emacs.service (ExecStart): Make Emacs exit from systemd work
better (bug#45181).

The problem here is the exit code 15, which emacs will return *only* if
it has received SIGTERM. I believe what's happening here is that
emacsclient will call kill-emacs but not wait until the emacs server
has properly shut down. However, it's supposed to wait for the shutdown
as an "ExecStop" command according to "man systemd.service". So since
the process is still alive when emacsclient comes back, systemd will
still issue SIGTERM, making emacs return 15 (maybe after calling kill-
emacs again?!).

Copyright-paperwork-exempt: yes

Mention how to handle user names with @ in rmail

* doc/emacs/rmail.texi (Remote Mailboxes): Mention how to work
around the problem with user names like foo@example.com (bug#16946).

Copyright-paperwork-exempt: yes

Make goto-char offer the number at point as default

* lisp/subr.el (read-natnum-interactive): New function to read natural
numbers for interactive functions.
* src/editfns.c (Fgoto_char): Call read-natnum-interactive from the
interactive definition of goto-char to offer the number at point as
default.  Also expand the docstring to document this new interactive
behavior.
* doc/emacs/basic.texi (Moving Point): Expand the Emacs manual to
document this new behavior.
* etc/NEWS: And announce it (bug#45199).

Tool bar documentation clarification: Mention forcing updates

* doc/lispref/keymaps.texi (Tool Bar): Document that flipping the
status of a tool bar item doesn't necessarily update the visuals
(bug#42957).

Fix narrow-to-defun in python-mode

* lisp/progmodes/python.el (python-nav--beginning-of-defun): Make
narrow-to-defun work better in classes (bug#40563).

Copyright-paperwork-exempt: yes

Add a new recursively bound `current-minibuffer-command' variable

* doc/lispref/commands.texi (Command Loop Info): Document it
(bug#45177).

* src/callint.c (Fcall_interactively): Bind it.

* src/keyboard.c (syms_of_keyboard): Define
current-minibuffer-command.

Add a DirectoryMode to the Emacs Server example

* doc/emacs/misc.texi (Emacs Server): Update example

* doc/emacs/misc.texi (Emacs Server): The socket containing directory
is per default created with permissions 0755 by the socket-unit.
However this is considered unsafe since commit [1], so enhance unit
example with systemd configuration directive `DirectoryMode=' to
create it with safe permissions, see
https://www.freedesktop.org/software/systemd/man/systemd.socket.html#DirectoryMode=

[1] 2003-04-12 "(server-socket-name): Use new safe location for socket."

Copyright-paperwork-exempt: yes

Update value of frame-title-format in FAQ

* doc/misc/efaq.texi (Displaying the current file name in the
titlebar): Fix default value of frame-title-format.

Don't recommend setnu and wb-line-number

* doc/misc/efaq.texi (Displaying the current line or column): Remove
reference to third-party alternatives to display-line-numbers-mode.

Remove more references to old versions from FAQ

* doc/misc/efaq.texi (Learning how to do something)
(Installing Emacs, Emacs for GNUstep, Emacs for macOS): Remove more
references to Emacs 22 and older from FAQ.

Make XEmacs compat variable warning-level-aliases obsolete

* lisp/emacs-lisp/warnings.el (warning-level-aliases): Make obsolete.
(display-warning): Warn when using one of the warning levels defined
in above obsolete variable.  (Bug#44849)
* lisp/url/url-proxy.el (url-find-proxy-for-url): Replace obsolete
warning type 'critical with :error.

Prefer setq to set+quote

* lisp/cedet/semantic/senator.el (senator-lazy-highlight-update):
* lisp/emulation/edt.el (edt-find, edt-restore-key)
(edt-remember):
* lisp/eshell/em-ls.el (eshell-ls--insert-directory):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/progmodes/hideif.el (hide-ifdef-mode):
* test/lisp/url/url-future-tests.el (url-future-tests): Prefer setq to
set+quote.