Add test for add-to-ordered-list

Add some tests to find-func.el

Minor improvements to FD_SETSIZE overflow checks.

* src/process.c (Fmake_serial_process): Add port to error data.
(connect_network_socket): Add an explanatory comment.

Manually limit file descriptors that we select on to FD_SETSIZE.

This works even if another thread or process resets the resource limit
for open file descriptors, e.g., using 'prlimit' on GNU/Linux.

* src/process.c (create_process, create_pty, Fmake_pipe_process)
(Fmake_serial_process, connect_network_socket)
(server_accept_connection): Limit file descriptors to FD_SETSIZE.
* test/src/process-tests.el (process-tests--with-raised-rlimit): New
helper macro.
(process-tests--fd-setsize-test): Rename from
'process-tests--with-many-pipes'.  Increase resource limit during test
if possible.
(process-tests/fd-setsize-no-crash/make-process)
(process-tests/fd-setsize-no-crash/make-pipe-process)
(process-tests/fd-setsize-no-crash/make-network-process)
(process-tests--new-pty): Rename callers.

Fix a potential unit test breakage on GNU/Linux.

* test/src/process-tests.el
(process-tests/fd-setsize-no-crash/make-process): Allow special exit
codes that can happen if terminal setup fails in the child process.

Fix an incorrect Edebug specification.

* test/src/process-tests.el (process-tests--with-many-pipes): Fix
incorrect Edebug specification.

Consistently check for FD_SETSIZE overflow.

Previously this was only checked in a few places.  Now assert that
file descriptors are within the expected range whenever we'd otherwise
introduce undefined behavior.

* src/process.c (add_read_fd, add_process_read_fd, delete_read_fd)
(recompute_max_desc, delete_write_fd, compute_input_wait_mask)
(compute_non_process_wait_mask, compute_non_keyboard_wait_mask)
(compute_write_mask, clear_waiting_thread_info)
(update_processes_for_thread_death, Fset_process_thread)
(create_process, create_pty, Fmake_pipe_process)
(Fprocess_datagram_address, Fset_process_datagram_address)
(Fmake_serial_process, finish_after_tls_connection)
(connect_network_socket, deactivate_process)
(server_accept_connection, wait_reading_process_output)
(read_process_output, read_and_dispose_of_process_output)
(send_process, Fcontinue_process, Fprocess_send_eof)
(Fprocess_filter_multibyte_p, keyboard_bit_set)
(add_timer_wait_descriptor, setup_process_coding_systems): Add
assertions to document and check that file descriptors are within the
expected range when used as file descriptor set elements or array
subscripts.

Extend and overhaul FD_SETSIZE overflow tests.

Instead of trying to generate the right number of processes,
pre-create lots of unused pipe processes until creation fails.  Extend
the tests to the 'pty' connection type and other kinds of process
objects.

* test/src/process-tests.el (process-tests--ignore-EMFILE)
(process-tests--with-buffers, process-tests--with-processes)
(process-tests--with-many-pipes, process-tests--with-temp-file)
(process-tests--with-temp-directory): New helper macros.
(process-tests/fd-setsize-no-crash/make-process): Renamed from
'process-tests/fd-setsize-no-crash'.  Fail on timeout.  Also test the
'pty' connection type.  Pre-create lots of pipe processes so we reach
the FD_SETSIZE limit faster.  Ignore EMFILE more precisely, if
possible.
(process-tests/fd-setsize-no-crash/make-pipe-process)
(process-tests/fd-setsize-no-crash/make-network-process)
(process-tests/fd-setsize-no-crash/make-serial-process): New tests
that test FD_SETSIZE limits for other kinds of processes.
(process-tests--EMFILE-message): New helper function and cache
variable.
(process-tests--new-pty): New helper function.

* src/nsterm.m (ns_select): Fix off-by-one error, and add assertion

; * test/src/process-tests.el: Fix comment style.

CC Mode: correct the handling of empty strings

In particular, have the macro cache invalidated after its last use in
c-before-change.

* lisp/progmodes/cc-langs.el (c-get-state-before-change-functions): Remove
c-invalidate-macro-cache from the entries it's in, moving it to....

* lisp/progmodes/cc-mode.el (c-before-change): Call c-invalidate-macro-cache
directly from the functions, after the call to c-invalidate-state-cache.

Fix Help menu on macOS

* src/nsmenu.m (ns_update_menubar): Make sure to reset the help menu
when we move it to another submenu.

Use standard key symbols in NS menu entries

* src/nsmenu.m (skipspc): Remove.
(key_symbols, prettify_key): New.
([EmacsMenu fillWithWidgetValue:]): Call prettify_key.

; * src/nsmenu.m: Undo unintentional change

Remove redundant 'function's around lambda in align.el

* lisp/align.el (align-rules-list, align-exclude-rules-list)
(align-vhdl-rules-list, align-highlight-rule): Remove redundant
'function's around lambda.

Add 'project-relative' as value for 'xref-file-name-display'

* lisp/progmodes/xref.el (xref-file-name-display): Document new value.
(xref-location-group ((l xref-file-location))): Handle the new value.
(xref--project-root): Extract from the default method of
'xref-backend-references' so it can be used in above's new code.
Also fix an old bug in the "backward compat" branch.

* lisp/progmodes/xref.el (xref--project-root-memo): New variable.

* test/lisp/progmodes/xref-tests.el: Add test cases for the three
possible settings of 'xref-file-name-display'.

Co-authored-by: Tobias Rittweiler <trittweiler@gmail.com>

Fix some over-wide docstrings

* lisp/cedet/semantic/analyze/refs.el
(semantic-analyze-refs-proto)
(semantic-analyze-refs-impl):
* lisp/cedet/semantic/symref.el
(semantic-symref-hit-to-tag-via-buffer):
* lisp/emacs-lisp/chart.el (chart-axis-draw):
* lisp/emacs-lisp/cl-macs.el (cl-defstruct, cl-loop):
* lisp/emacs-lisp/eieio-core.el (eieio--add-new-slot):
* lisp/eshell/em-unix.el (eshell/info):
* lisp/gnus/deuglify.el (gnus-outlook-rearrange-article):
* lisp/gnus/gnus-agent.el (gnus-agent-read-article-number):
* lisp/gnus/gnus-util.el (gnus-put-overlay-excluding-newlines)
(gnus-put-text-property-excluding-newlines):
* lisp/gnus/message.el (message-sort-headers):
* lisp/gnus/nntp.el (nntp-with-open-group)
(nntp-with-open-group-function):
* lisp/gnus/nnvirtual.el (nnvirtual-create-mapping):
* lisp/mail/feedmail.el (feedmail-fiddle-list-of-fiddle-plexes)
(feedmail-queue-reminder, feedmail-mail-send-hook-splitter):
* lisp/net/dictionary.el (dictionary-do-matching):
* lisp/obsolete/longlines.el (longlines-auto-wrap):
* lisp/org/ob-sql.el (org-babel-sql-dbstring-vertica):
* lisp/org/ol-bbdb.el (org-bbdb-date-list):
* lisp/progmodes/cc-cmds.el (c-mark-function):
* lisp/progmodes/cperl-mode.el (cperl-add-tags-recurse)
(cperl-add-tags-recurse-noxs-fullpath)
(cperl-add-tags-recurse-noxs):
* lisp/progmodes/etags.el (tags-search):
* lisp/progmodes/verilog-mode.el (verilog-delete-auto-buffer)
(verilog-auto-re-search-do, verilog-expand-vector-internal):
* lisp/textmodes/reftex-parse.el (reftex-init-section-numbers):
* lisp/textmodes/reftex-toc.el
(reftex-toc-load-all-files-for-promotion):
* lisp/textmodes/sgml-mode.el (html-mode):
* lisp/textmodes/table.el (table--transcoord-cache-to-table)
(table--transcoord-table-to-cache, table--remove-eol-spaces)
(table--region-in-cell-p, table-goto-bottom-right-corner)
(table-split-cell-horizontally):
* lisp/url/url-handlers.el (url-insert):
* lisp/vc/ediff-util.el (ediff-inferior-compare-regions): Fix doc
strings to not exceed 80-column limits.  (Bug#44858)

Plug NS memory leaks (bug#45502)

* src/nsmenu.m ([EmacsMenu addItemWithWidgetValue:attributes:]):
Mark allocated and owned objects for autorelease.

Add variables read-char-choice-use-read-key and y-or-n-p-use-read-key

* lisp/subr.el (read-char-choice-use-read-key): New variable.
(read-char-choice): Use read-char-from-minibuffer when
read-char-choice-use-read-key is nil.
(y-or-n-p-use-read-key): New variable.
(y-or-n-p): Restore old code that calls read-key to use it when
y-or-n-p-use-read-key is non-nil.

* lisp/dired-aux.el (dired--no-subst-ask, dired-query):
* lisp/files.el (files--ask-user-about-large-file)
(hack-local-variables-confirm):
* lisp/userlock.el (ask-user-about-supersession-threat):
* lisp/wid-edit.el (widget-choose): Revert to use read-char-choice
instead of read-char-from-minibuffer.

https://lists.gnu.org/archive/html/emacs-devel/2020-12/msg01919.html

* src/dbusbind.c (XD_BASIC_DBUS_TYPE): Fix error in declaration.

In Isearch bind 'C-s M-y' to isearch-yank-pop-only with old code (bug#45483)

* lisp/isearch.el (isearch-menu-bar-yank-map, isearch-mode-map):
(isearch-forward): Use isearch-yank-pop-only instead of isearch-yank-pop.
(isearch-yank-pop): Mention isearch-yank-pop-only.
(isearch-yank-pop-only): New command with old body from Emacs 27.

; * etc/NEWS: Move entry to correct heading.

Minor cleanup in keymap.c

* src/keymap.c (get_keymap, keymap_parent, Fset_keymap_parent)
(store_in_keymap, Fdefine_key, Flookup_key, define_as_prefix)
(silly_event_symbol_error, current_minor_maps)
(Fcurrent_active_maps, Fkey_binding, Flocal_key_binding)
(Fminor_mode_key_binding, Fdefine_prefix_command)
(Faccessible_keymaps, Fdescribe_buffer_bindings)
(describe_vector, Fwhere_is_internal): Minor cleanup.

Also count symbol plists in memory-report

* lisp/emacs-lisp/memory-report.el (memory-report--symbol-plist):
New function.
(memory-report): Use it.

Revert "Switch add-to-ordered-list to eql"

This reverts commit b4fd857ead728a06380250c5336c1ab94a7c2f7a.

I misunderstood the purposed of the function.

; Fix my previous commit

* test/src/chartab-tests.el (chartab-test-char-table-extra-slot): Fix
test.

Add some char-table tests

* test/src/chartab-tests.el (chartab-test-char-table-p)
(chartab-test-char-table-subtype)
(chartab-test-char-table-parent)
(chartab-test-char-table-extra-slot): New tests.

Switch add-to-ordered-list to eql

* doc/lispref/lists.texi (List Variables): Update documentation.

* lisp/subr.el (add-to-ordered-list): Switch to eql (bug#45539).

Improve the `long' computation of `mode-line-compact'

* src/xdisp.c (display_mode_line): Compute `long' based on total
window width, and use the passed-in window instead of the selected
window.

Add caveat about the `long' `mode-line-compact' setting

* doc/lispref/modes.texi (Mode Line Basics): Elaborate on the
`long' setting.

Minor refactoring of xref-tests

* test/lisp/progmodes/xref-tests.el (xref-tests-data-dir):
Rename to 'xref-tests--data-dir'.
(xref-tests--matches-in-data-dir, xref-tests--locations-in-data-dir):
New functions.  Factored out from test cases and updated usage sites
to use them.

Don't calculate macOS menu data for GNUstep (bug#45502)

* src/nsmenu.m ([EmacsMenu fillWithWidgetValue:]): #ifdef out code
that has no effect on GNUstep and autorelease alloc'd objects.

* src/Makefile.in (DO_CODESIGN): Fix architecture for Apple Silicon

Use explicit "--color=auto" in grep mode to support both GNU grep and ripgrep

* lisp/progmodes/grep.el (grep-highlight-matches):
(grep-compute-defaults, grep-expand-template):
Use "--color=auto" instead of "--color" (bug#44983).

* lisp/x-dnd.el (x-dnd-get-drop-x-y): Add safer check for top/left (bug#45277)

A better fix for process-tests on MS-Windows

* src/w32.c (pipe2): When forcibly closing pipe handles due to
overflow of FD_SETSIZE, set the handles to -1, to avoid assertion
violations in emacs_close.

* test/src/process-tests.el (process-tests/fd-setsize-no-crash):
No need to skip this test anymore.

Fix process-tests on MS-Windows

* test/src/process-tests.el (process-tests/fd-setsize-no-crash):
Skip this test on windows-nt systems, as we cannot use more than
FD_SETSIZE file descriptors there: if we try, we crash.

xref-show-definitions-completing-read: Tune up completion

* lisp/minibuffer.el (completion-category-defaults)
Use 'substring' completion style for 'xref-location' category by
default.

* lisp/progmodes/xref.el (xref-show-definitions-completing-read):
Assign the 'xref-location' category to the completions. Pass
REQUIRE-MATCH=t.

Instrument process-tests.el for timeouts on emba

Add a regression test for Bug#24325.

* test/src/process-tests.el (process-tests/fd-setsize-no-crash): New
unit test.

More readable keys in NS menu entries (bug#45502)

Each menu entry now has the key binding in a right-aligned column, as
an attempt to improve readability.  Previously the keys were given in
brackets immediately following the menu string.

* src/nsmenu.m ([EmacsMenu parseKeyEquiv:]): Remove.
(skipspc): New helper function.
([EmacsMenu addItemWithWidgetValue:]): Add attributes argument.
Use attributed title string.  Don't special-case Super bindings.
([EmacsMenu fillWithWidgetValue:]): Compute maximum width.  Prepare
attributes for title.

Sync with Tramp 2.5.0

* doc/misc/trampver.texi:
* lisp/net/trampver.el: Change version to "2.5.0".

* test/lisp/net/tramp-tests.el
(tramp--test--deftest-direct-async-process): Check, that
`make-process' supports file name handlers.  Suppress
`internal-default-process-sentinel'.
(tramp--test-async-shell-command): Set `proc' proper.
(tramp-test32-shell-command-direct-async): Tag it :unstable.

Revert "Allow the flymake mode line indicator to be customized"

This reverts commit 37049ee78c4576d340781179317e6cbaaf73b6c3.

It's not ready to be used, contains some fundamental errors.

See bug#33740.

Fix crash in NS menu code

* src/nsmenu.m (ns_update_menubar): When the menu generation code was
copied from xmenu.c the fix for waiting_for_input was lost.  Reinstate
it.

Add some tests for align.el

* src/xdisp.c (display_mode_line): I guess FALSE should be false.

Revert the previous display_string change

* src/xdisp.c (display_string): Revert adding the additional
ignore_text_properties parameter -- it was already covered by the
other mix of parameters.

Fix compact mode line text properties

* src/xdisp.c (display_mode_line): Display the compact mode
correctly (with text properties) (bug#45520).

Add a parameter to display_string to allow not ignoring text props

* src/xdisp.c (display_string): Add a parameter to allow not
ignoring text properties (bug#45520).  Adjust callers throughout
xdisp.c.

Introduce new variable mode-line-compact

* doc/lispref/modes.texi (Mode Line Basics): Document it (bug#34476).

* src/xdisp.c (display_mode_line): Use it.
(syms_of_xdisp): New variable mode-line-compact.

Allow the flymake mode line indicator to be customized

* doc/misc/flymake.texi (Customizable variables): Mention it.

* lisp/progmodes/flymake.el (flymake-mode-line-indicator-format):
New variable (bug#33740).
(flymake--mode-line-format): Use it.

Add a SPLIT parameter to `format-spec'

* doc/lispref/strings.texi (Custom Format Strings): Document it.

* lisp/format-spec.el (format-spec): Add an optional parameter to
return a list of strings (bug#33740).

Reword a long docstring in cc-langs.el

* lisp/progmodes/cc-langs.el (c-vsemi-status-unknown-p-fn): Reword
docstring to fit within 80 columns and silence the corresponding
byte-compiler warning (bug#44858).

Add a reference between the Strings node and Search/Replace

* doc/lispref/strings.texi (Creating Strings): Mention
string-replace/replace-regexp-in-string (bug#45516).

Allow mixing attributes and comments in the diary file

* lisp/calendar/diary-lib.el (diary-face-attrs): The attributes
don't have to be at the end of the line -- there may be ##warntime
or other comments (bug#19965).

Robustify completion match scoring for optimized patterns

Fixes: bug#42149
The function completion-pcm--hilit-commonality, which propertizes and
scores a previously confirmed match, expected its PATTERN argument to
match the strings of COMPLETIONS entirely (i.e. up to the string's
very end).  But sometimes the ending wildcard, represented by the
'any' atom in PATTERN, is optimized away by
completion-pcm--optimize-pattern.  Although this is mostly benign in
terms of highlighting commonality, it leads to incorrect score values.

In this change, we ensure that completion-pcm--hilit-commonality is
aware of this exception and isn't affected by it.  We also document
the function a bit better and simplify its workings.

Originally reported by Dario Gjorgjevski <dario.gjorgjevski@gmail.com>

* lisp/minibuffer.el (completion-pcm--hilit-commonality):
Simplify.  Add docstring.

* lisp/minibuffer.el (completion-pcm--hilit-commonality): Add
docstring

CC Mode: Add newish AWK Mode facilities, as used in gawk-4.

* lisp/progmodes/cc-awk.el (c-awk-font-lock-invalid-namespace-separators):
New function.
(c-awk-context-expand-fl-region): New function.
(awk-font-lock-keywords): Enhance handling of function declarations to include
:: tokens.  Fontify new system variable names FPAT, FUNCTAB, PREC, ROUNDMODE,
SYNTAB.  Fontify new keywords BEGINFILE and ENDFILE.  Fontify new system
functions asorti, dcngettext, isarray, patsplit, typeof.  Fontify the new
directives @include, @load, @namespace.  Call
c-awk-font-lock-invalid-namespace-separators as a matcher.

* lisp/progmodes/cc-fonts.el (top level): No longer require 'cc-awk.

* lisp/progmodes/cc-langs.el (c-before-context-fontification-functions): Give
AWK the value c-awk-context-expand-fl-region rather than nil.

* lisp/progmodes/cc-mode.el (top level): Declare awk-mode-syntax-table as a
variable.

* lisp/minibuffer.el: Avoid consecutive `any` in completion patterns

(completion-pcm--optimize-pattern): Turn multiple consecutive
occurrences of `any` into just a single one.
Suggested by Dario Gjorgjevski <dario.gjorgjevski@gmail.com>.

Fix package tests for tetris no longer existing as a package

* test/lisp/emacs-lisp/package-tests.el
(package-test-list-filter-by-name, package-test-list-clear-filter):
Use ansi-color instead of tetris, which no longer has a version:.

Fix crash in NS menu code

* src/nsmenu.m (ns_update_menubar): Don't assume that the top level
menus are correct when populating the submenus.
(free_frame_menubar): Clear the menu.
([EmacsMenu removeAllItems]): Actually remove all menu items.

Minor cleanups in tetris.el

* lisp/play/tetris.el: Remove redundant :group args.
(tetris-get-tick-period): Drop unnecessary check.
(tetris): Stylistic doc fixes.

* lisp/ps-print.el (ps-message-log-max): Remove XEmacs compat code.

Remove redundant 'function's around lambda in vhdl-mode.el

* lisp/progmodes/vhdl-mode.el (fboundp, vhdl-sort-alist, lambda)
(vhdl-create-mode-menu, vhdl-set-offset, vhdl-set-style)
(vhdl-regress-line, vhdl-align-inline-comment-region-1)
(vhdl-resolve-paths, vhdl-generate-makefile-1)
(vhdl-submit-bug-report): Remove redundant 'function's around lambda.

Fix too-long feedmail-sendmail-f-doesnt-sell-me-out doc string

* lisp/mail/feedmail.el (feedmail-sendmail-f-doesnt-sell-me-out):
Fold the example SMTP header using continuation folding.

Fill some auto-generated docstrings

* lisp/emacs-lisp/easy-mmode.el (define-minor-mode)
(define-globalized-minor-mode): Fill auto-generated documentation
strings.  (Bug#44858)
* lisp/subr.el (internal--fill-string-single-line)
(internal--format-docstring-line): New functions.

Make byte-compiler warn about wide docstrings

* lisp/emacs-lisp/bytecomp.el (byte-compile--wide-docstring-p):
(byte-compile-docstring-length-warn): New defuns.
(byte-compile-docstring-max-column): New defcustom.
(byte-compile--wide-docstring-substitution-len): New variable.
(byte-compile-warning-types, byte-compile-warnings): New value
'docstrings'.
(byte-compile-file-form-autoload, byte-compile-file-form-defvar):
(byte-compile-file-form-defvar-function, byte-compile-lambda):
(byte-compile-defvar, byte-compile-file-form-defalias): Warn about too
wide docstrings.  (Bug#44858)

* test/lisp/emacs-lisp/bytecomp-tests.el
(bytecomp-warn-wide-docstring/defconst)
(bytecomp-warn-wide-docstring/defvar): New tests.
(bytecomp--define-warning-file-test): New macro.
(bytecomp/warn-wide-docstring-autoload\.el)
(bytecomp/warn-wide-docstring-custom-declare-variable\.el)
(bytecomp/warn-wide-docstring-defalias\.el)
(bytecomp/warn-wide-docstring-defconst\.el)
(bytecomp/warn-wide-docstring-define-abbrev-table\.el)
(bytecomp/warn-wide-docstring-define-obsolete-function-alias\.el)
(bytecomp/warn-wide-docstring-define-obsolete-variable-alias\.el)
(bytecomp/warn-wide-docstring-defun\.el)
(bytecomp/warn-wide-docstring-defvar\.el)
(bytecomp/warn-wide-docstring-defvaralias\.el)
(bytecomp/warn-wide-docstring-ignore-fill-column\.el)
(bytecomp/warn-wide-docstring-ignore-override\.el)
(bytecomp/warn-wide-docstring-ignore\.el)
(bytecomp/warn-wide-docstring-multiline-first\.el)
(bytecomp/warn-wide-docstring-multiline\.el): New tests.
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-autoload.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-custom-declare-variable.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-defalias.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-defconst.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-define-abbrev-table.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-define-obsolete-function-alias.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-define-obsolete-variable-alias.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-defun.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-defvar.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-defvaralias.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-ignore-fill-column.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-ignore-override.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-ignore.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-multiline-first.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-wide-docstring-multiline.el:
New files.

Make octave-send-region be asynchronous

* lisp/progmodes/octave.el (octave-send-region): Send things
asynchronously to the inferior process (bug#24492).

Make XIM to work with non-CJK locales

* src/xfns.c (best_xim_style): Don't rely on supported_xim_styles
(bug#10867).

* src/xterm.c (x_draw_window_cursor): Adjust to modern input styles.
(xim_instantiate_callback): Ditto.

Fix background mode on Gnome 3.38 terminals

* lisp/term/xterm.el (xterm--version-handler): Adjust to Gnome
3.38 (bug#43891).

Fix alignment of Java String[] and the like

* lisp/align.el (align-rules-list): Allow aligning Java String[] etc
(bug#19385).

Test case:

class X
{
    String field1;
    String[] field2;
    int field3;
    int[] field4;
    X field5;
    X[] field6;
}

Document the text property limitations in mode lines

* doc/lispref/modes.texi (Properties in Mode, Mode Line Basics):
Mention the special text property limitations.

Allow remember-notes to use the *scratch* buffer

* lisp/textmodes/remember.el (remember-notes): Allow the
remember-notes buffer to use the *scratch* buffer (as documented)
(bug#20740).

Rename and document the built-in xref-show-definitions-function's

* lisp/progmodes/xref.el (xref-show-definitions-buffer): Rename
from 'xref--show-defs-buffer'.
(xref-show-definitions-buffer-at-bottom): Rename from
'xref--show-defs-buffer-at-bottom'.

Do not output two spaces for non-autoloaded ieieo constructor functions

* lisp/emacs-lisp/eieio-opt.el (eieio-help-constructor): Amend
format to avoid two spaces for non-autoloaded object constructor
functions (bug#45454).

Copyright-paperwork-exempt: yes

* lisp/emacs-lisp/package.el (package-archives): Add NonGNU ELPA

* lisp/textmodes/rst.el (rst-mode): Don't touch global hook

(rst-re): η-reduce.

Remove NS menu synthesized events (bug#44333)

Remove the frame tracking stuff as it's not used for anything, and
move the update tracking into the EmacsMenu class.

* src/nsmenu.m (ns_update_menubar): Copy the parsing code from xmenu.c
and rework the NS specific code around to update the existing menus
instead of rebuilding them completely.
(ns_activate_menubar):
([EmacsMenu trackingNotification:]):
([EmacsMenu menuWillOpen:]):
([EmacsMenu menuDidClose:]): Remove unused functions.
([EmacsMenu menuNeedsUpdate:]): Remove menu tracking code and add code
to check whether an update is required.
([EmacsMenu fillWithWidgetValue:]):
([EmacsMenu addSubmenuWithTitle:]):
([EmacsMenu initWithTitle:]): Remove references to frame.
([EmacsMenu setFrame:]): Remove method.
([EmacsMenu clear]): Rename to removeAllItems.
([EmacsMenu removeAllItems]): Use built-in removeAllItems, if
available.
(syms_of_nsmenu): Remove tracking code.
* src/nsterm.m (ns_check_menu_open):
(ns_check_pending_open_menu):
(ns_create_terminal): Remove unused functions.
(ns_term_init): Get rid of menu tracking.
* src/nsterm.h (EmacsMenu): Remove frame, add needsUpdate and update
method definitions.

; Fix recent shortdoc.el and fns.c additions

* lisp/emacs-lisp/shortdoc.el (list): Fix typos.
* src/fns.c (Flength_equal): Fix docstring.

; Fix the recent `length' doc string addition

Fix up length_internal with degenerate length inputs

* src/fns.c (length_internal): Protect against edge conditions.

Improve "find definition" in *Help* buffers

* lisp/emacs-lisp/find-func.el (find-function-search-for-symbol): If
our regexp algorithm could not find a location for the symbol
definition, resort to find-function--search-by-expanding-macros.
* test/lisp/emacs-lisp/find-func-tests.el: Add a automatic test for a
function and variable generated by a macro.
* etc/NEWS: Advertise the improved functionality (bug#45443).

Add new predicates for sequence lengths

* doc/lispref/sequences.texi (Sequence Functions): Document them.
* lisp/emacs-lisp/byte-opt.el (side-effect-free-fns): Mark them as
side-effect-free.

* lisp/emacs-lisp/shortdoc.el (list): Mention them.

* src/fns.c (Flength): Mention them in the doc string.
(length_internal): New function.
(Flength_less, Flength_greater, Flength_equal): New defuns.
(syms_of_fns): Sym them.

Improve the edebug-form-data doc string

* lisp/emacs-lisp/edebug.el (edebug-form-data): Doc string
clarification (bug#42776).

* lisp/forms.el (forms--run-functions): New function

(forms--intuit-from-file, forms-save-buffer): Use it.
(forms-mode): Use it to fix regression.
Remove always-true test.  Fix incorrect uses of `fboundp`.
(forms--iif-hook): Use `add-hook`.
(forms--iif-post-command-hook): Use `remove-hook` and fix typo.
(forms--debug): Use `mapconcat`.

Fix test/src/process-tests on MS-Windows

* src/process.c (network_lookup_address_info_1) [WINDOWSNT]:
Initialize winsock.

Rename Tramp method "media" to "mtp" (Bug#45402)

* doc/misc/tramp.texi (Quick Start Guide, GVFS-based methods):
Rename "media" to "mtp".  (Bug#45402)

* etc/NEWS: Rename Tramp method "media" to "mtp".  Fix typos.

* lisp/net/tramp-gvfs.el (tramp-gvfs-methods, tramp-media-methods)
(tramp-gvfs-activation-uri)
(tramp-gvfs-handler-volumeadded-volumeremoved)
(tramp-get-media-devices, top): Rename "media" to "mtp".  (Bug#45402)

Avoid missing email messages due to rmail-spam-filter

* lisp/mail/rmail-spam-filter.el (rsf--rmail-last-seen-message):
New function.
(rmail-spam-filter, rmail-get-new-mail-filter-spam): Call
'rsf--rmail-last-seen-message' instead of
'rmail-first-unseen-message'.  (Bug#45128)

Copyright-paperwork-exempt: yes

Improvements for `:base-uri' svg image property

* src/image.c (svg_load): Use ENCODE_FILE for `:base-uri'

* doc/lispref/display.texi (SVG Images): Add more documentation for
  `:base-uri'

Fix messages with plural forms in todo-mode.el

* lisp/calendar/todo-mode.el (todo-move-item, todo-item-undone)
(todo-category-completions): Use 'ngettext' instead of hard-coding
plural forms by hand.

Fix issues with lib/malloc out-of-dir builds

Problem reported by Mattias Engdegård in:
https://lists.gnu.org/r/emacs-devel/2020-12/msg01626.html
* configure.ac: If the scratch_buffer module is enabled, create
lib/malloc and (if doing dependencies) lib/deps/malloc.
* lib/Makefile.in (DEPFLAGS) [AUTO_DEPEND]: No longer any need to
squash lib dependencies into a single directory.
(clean): Also remove */*.o and $(DEPDIR)/*/*.d, to clean out
malloc/*.o and deps/malloc/*.d.  Just remove *.d files in
dependencies so that rm does not complain about not being able to
remove deps/malloc.
(extraclean): Also remove malloc, if it is empty.

Kill the scdaemon after doing the mml-sec tests

* test/lisp/gnus/mml-sec-tests.el (mml-sec-test--kill-gpg-agent):
Kill the scdaemon, too (bug#43358).

Fix infloop in memory-report

* lisp/emacs-lisp/memory-report.el (memory-report--object-size-1):
Fix infloop on circular lists.

Fix package reloading problems on systems with symlinks

* lisp/emacs-lisp/package.el (package--files-load-history): We're
comparing the truenames, so ensure that we've using that
everywhere.  This fixes problems when there's symlinks in the paths.

Refactor package--list-loaded-files for easier debuggability

* lisp/emacs-lisp/package.el (package--files-load-history)
(package--list-of-conflicts): Factor out from...
(package--list-loaded-files): ... this function for easier
debuggability.

Disable some semantic tests on systems without g++

* test/lisp/cedet/semantic-utest-ia.el: Disable g++ tests on
systems without g++.

Skip some mml tests that rely on CMS if that's not installed

Fix gpg-agent killing in mml-sec-tests

* test/lisp/gnus/mml-sec-tests.el (mml-sec-test--kill-gpg-agent):
Identify the gpg-agent more successfully after the resource dir
makeover.

Merge from origin/emacs-27

b242bbb073 (origin/emacs-27) ; lisp/org/org.el: Fix Version header.
e0fc939c5f Add more details to the "word processor" section
fda9b3e83a * src/Makefile.in (DO_CODESIGN): Fix expected architecture...

; Merge from origin/emacs-27

The following commit was skipped:

6bf22c933d Codesign the executable on recene MacOS systems

Merge from origin/emacs-27

5d46593568 Support build of Emacs on ARM Macos machines
7f8793e5f1 Update to Org 9.4.4
7b3367a0b5 * lisp/so-long.el: Decrease use of passive voice.
a90836c638 * doc/misc/efaq.texi (New in Emacs 27): Add section.
711fe70dd8 * doc/misc/efaq.texi (Latest version of Emacs): Bump version.
52b30834fb * lisp/face-remap.el (face-remap-set-base): Doc fix.  (Bug...
b3fe0ac62e Correct argument order in comment