Fix wording of a recently added documentation

* etc/NEWS:
* doc/lispref/display.texi (Image Descriptors): Fix wording of the
description of :transform-smoothing.

* lisp/gnus/nnmh.el (nnmh-newsgroup-articles): Declare var

Reported by Barry Fishman <barry@ecubist.org>.

Along the way, I checked other variables which are similarly let-bound
to nil and then read with any intervening assignment, which found
another similar case of missing `defvar`s plus a bit of dead code.

* lisp/gnus/gnus-kill.el (gnus-apply-kill-file-internal):
Remove constant nil var `beg`.
* lisp/gnus/gnus-search.el (gnus-search-query-parse-kv):
Remove constant nil var `return`.
* lisp/gnus/gnus-start.el (gnus-ask-server-for-new-groups):
Remove constant nil var `group`.
(gnus-killed-assoc, gnus-marked-assoc, gnus-newsrc-assoc): Declare vars.
* lisp/gnus/gnus-sum.el (gnus-compute-read-articles):
Remove constant nil var `first`.
* lisp/gnus/nnbabyl.el (nnbabyl-request-accept-article):
Remove constant nil var `beg`.
* lisp/gnus/nnfolder.el (nnfolder-possibly-change-group):
Remove constant nil var `inf`.
* lisp/gnus/nnrss.el (nnrss-request-article):
Remove constant nil var `err`.

; Fix US spelling in last change.

Enable selectable image smoothing (bug#38394)

* lisp/doc-view.el (doc-view-insert-image): Always use smoothing in
docview.
* lisp/image-mode.el (image-transform-smoothing): New variable.
(image-mode-map): Add smoothing binding.
(image-transform-properties): Apply smoothing when requested.
(image-transform-set-smoothing): New function.
(image-transform-reset): Reset smoothing.
* src/image.c (image_set_transform): Use new :transform-smoothing
attribute.
(syms_of_image): Add :transform-smoothing attribute.
* doc/lispref/display.texi (Image Descriptors): Document new
:transform-smoothing property.

* lisp/tab-bar.el (tab-bar-close-group-tabs): New command.

(tab-close-group): New alias.
(tab-bar-close-other-tabs): Rewrite to fix old bug where regardless of
the returned value from tab-bar-tab-prevent-close-functions,
only one tab was retained.

* lisp/tab-bar.el: 'C-x t G' (tab-group) assigns a group name to the tab.

* lisp/tab-bar.el (tab-bar--tab, tab-bar--current-tab): Add tab group if any.
(tab-bar-change-tab-group): New command.
(display-buffer-in-new-tab): Handle tab-group alist entry.
(tab-group): New alias.
(tab-prefix-map): Bind "G" to 'tab-group'.

Highlight the entire summary line for selected articles

* lisp/gnus/gnus-sum.el (gnus-highlight-selected-summary):
Highlight the entire summary line (bug#47026).

Remove Emacs 19 workaround from cperl-mode.el

* lisp/progmodes/cperl-mode.el (cperl-make-indent): Remove Emacs 19
workaround.

Fix byte-compilation warning in benchmark-run

* lisp/emacs-lisp/benchmark.el (benchmark-run): Avoid a
byte-compilation warning about an empty let body (bug#46819).

* lisp/files.el (cd): Improve error message.

Mark string predicates side-effect-free

* lisp/emacs-lisp/byte-opt.el (side-effect-free-fns): Add string>,
string-greaterp, string-empty-p, string-prefix-p, string-suffix-p
and string-blank-p, all recently marked pure.

Remove several references to Emacs 22 and earlier

* admin/charsets/mapfiles/README:
* doc/emacs/custom.texi (Saving Customizations):
* doc/lispintro/emacs-lisp-intro.texi (Simple Extension):
* doc/misc/efaq-w32.texi (Location of init file):
* doc/misc/gnus-faq.texi (FAQ 1-3):
* doc/misc/gnus.texi (Top, Various, Image Enhancements):
* lisp/erc/erc-menu.el (menu):
* lisp/progmodes/cfengine.el (cfengine-fill-paragraph):
Remove some references to Emacs 22 and earlier.

* doc/lispref/buffers.texi:
* doc/lispref/eval.texi:
* doc/lispref/files.texi:
* doc/lispref/keymaps.texi:
* doc/lispref/loading.texi:
* doc/lispref/minibuf.texi:
* doc/lispref/positions.texi:
* doc/lispref/variables.texi: Remove comments about "Emacs 19
specific" features.

Fix duplicate ":" in ert-find-test-other-window prompt

* lisp/emacs-lisp/ert.el (ert-find-test-other-window): Don't insert
duplicate ":" in prompt.

Do mode tagging in ert.el

Use proper command substitutions in some docstrings

* lisp/arc-mode.el (archive-mode):
* lisp/ibuffer.el (ibuffer):
* lisp/tar-mode.el (tar-mode):
* lisp/textmodes/table.el (table-insert): Use substitute-command-keys
instead of hardcoded keys in some docstrings.

* lisp/userlock.el: Use lexical-binding.

Use 'help-key-binding' face in userlock.el

* lisp/userlock.el (userlock--fontify-key): New function.
(ask-user-about-lock, ask-user-about-lock-help,
(ask-user-about-supersession-threat)
(ask-user-about-supersession-help): Add face 'help-key-binding' to
displayed keys.

(project-switch-commands): Remove the ###autoload instruction

* lisp/progmodes/project.el (project-switch-commands):
Remove the ###autoload instruction.  It's unnecessary and can
cause surprises in some circumstances (bug#46986).

* lisp/help.el (help--describe-translation): Fix typo.

* lisp/mail/rmailmm.el: Use `cl-defstruct` and `lexical-binding`

Remove redundant `:group` args.
(rmail-mime-entity): Make it a `cl-defstruct`.
(rmail-mime-entity-set-truncated): Mark as obsolete.
(rmail-mime-display): New `cl-defstruct`.
(rmail-mime-shown-mode, rmail-mime-hidden-mode, rmail-mime-raw-mode)
(rmail-mime-toggle-hidden, rmail-mime-update-tagline)
(rmail-mime-text-handler, rmail-mime-bulk-handler)
(rmail-mime-process-multipart, rmail-mime-handle, rmail-mime-process)
(rmail-mime-parse, rmail-mime-insert, rmail-show-mime): Adjust accordingly.
(rmail-mime-toggle-raw): Apply de Morgan.
(rmail-mime-insert-text): Remove unused var `tagline`.
(rmail-mime-insert-image): Remove unused var `content-type`.
(shr-inhibit-images, shr-width): Declare vars.
(rmail-mime-insert-multipart): Remove unused vars `tagline` and `body`.
(rmail-mime-insert): Remove unused var `tagline`.
(rmail-search-mime-message): Remove unused var `body-end`.

Port alternate signal stack to upcoming glibc 2.34

* src/sysdep.c (sigsegv_stack): Increase size to 64 KiB and align
it to max_align_t.  This copies from Gnulib’s c-stack.c, and works
around a portability bug in draft glibc 2.34, which no longer
defines SIGSTKSZ when _GNU_SOURCE is defined.

* src/buffer.c (Fbuffer_swap_text): Swap `mark-active` as well

This avoids undesirable situations where `mark-active` is set even
though the `mark` isn't.

* lisp/tab-bar.el (tab-bar-select-tab): Set window-state-put WINDOW arg to nil

WINDOW arg nil will always create a new window regardless of the value
returned by 'frame-root-window' that is nondeterministic - it returns
an internal window when there are more than 1 window on the frame/tab,
otherwise it returns a live window that was reused between different tabs
(bug#46904)
(tab-prefix-map): Bind "u" to 'tab-undo'.

* lisp/emacs-lisp/cconv.el: Don't confuse a string for a docstring

(cconv--convert-funcbody): Check there's something after a docstring.

* test/lisp/emacs-lisp/bytecomp-tests.el (bytecomp-string-vs-docstring):
New corresponding test.

smerge-vc-next-conflict: Move to conflict markers more reliably

* lisp/vc/smerge-mode.el (smerge-vc-next-conflict): Search for a
conflict marker if call to (vc-find-conflicted-file) haven't resulted in
a jump to one.  And remove `buffer` variable that becomes unused.

Strip text properties from the default string

* lisp/progmodes/project.el (project--read-regexp):
Strip text properties from the default string (bug#47012).

Make semantic/idle not move point after last change

* lisp/cedet/semantic/idle.el (semantic--eldoc-info): Don't move
point (bug#46999).

; NEWS fix

* lisp/progmodes/xref.el (xref-after-update-hook): New defcustom (bug#46992).

(xref--insert-xrefs): Use run-hooks on it.

* lisp/faces.el (help-argument-name): Use grey background, not foreground

https://lists.gnu.org/archive/html/emacs-devel/2021-03/msg00402.html

* lisp/net/*.el: Use lexical-binding

Also remove some redundant `:group` arguments.

* lisp/net/eudc-export.el: Use lexical-binding.
(eudc-create-bbdb-record): Use `cl-progv` and `apply` to avoid `eval`.

* lisp/net/eudc-hotlist.el: Use lexical-binding.

* lisp/net/eudc.el (eudc-print-attribute-value): Use `funcall` to avoid
`eval`.

* lisp/net/eudcb-bbdb.el: Use lexical-binding.
(eudc-bbdb-filter-non-matching-record): Use `funcall` to avoid `eval`.
Move `bbdb-val` binding to avoid `setq`.
Use `seq-some` instead of `eval+or`.
(eudc-bbdb-format-record-as-result): Use `dolist` and `pcase`.
Use `funcall` to avoid `eval`.
(eudc-bbdb-query-internal): Simplify a bit.

* lisp/net/eudcb-ldap.el: Use lexical-binding.
(eudc-ldap-get-host-parameter): Use `defalias` to avoid `eval-and-compile`.

* lisp/net/telnet.el: Use lexical-binding.
* lisp/net/quickurl.el: Use lexical-binding.
* lisp/net/newst-ticker.el: Use lexical-binding.
* lisp/net/newst-reader.el: Use lexical-binding.
* lisp/net/goto-addr.el: Use lexical-binding.
* lisp/net/gnutls.el: Use lexical-binding.
* lisp/net/eudcb-macos-contacts.el: Use lexical-binding.
* lisp/net/eudcb-mab.el: Use lexical-binding.

* lisp/net/net-utils.el: Use lexical-binding.
(finger): Remove unused var `found`.

* lisp/net/network-stream.el (open-protocol-stream): Remove redundant
`defalias`.

* lisp/net/newst-plainview.el: Use lexical-binding.
(newsticker-hide-entry, newsticker-show-entry): Remove unused var
`is-invisible`.
(w3m-fill-column, w3-maximum-line-length): Declare vars.

* lisp/net/tramp.el (tramp-compute-multi-hops):
* lisp/net/tramp-compat.el (tramp-compat-temporary-file-directory):
* lisp/net/tramp-cmds.el (tramp-default-rename-file):
* lisp/net/webjump.el (webjump): Don't forget lexical-binding for `eval`.

Fix handling of `tramp-cache-{g,s}et-count-*'

* lisp/net/tramp-cache.el (tramp-get-file-property)
(tramp-set-file-property): Fix handling of `tramp-cache-{g,s}et-count-*'.

Fix structure of condition object in nested 'ert-fail'.

See the test 'ert-test-fail' for the expected structure.

* lisp/emacs-lisp/ert.el (ert--should-signal-hook): Condition list
should be (SYMBOL . DATA), not (SYMBOL DATA).
* test/lisp/emacs-lisp/ert-tests.el (ert-test-fail-inside-should): Fix
unit test.

Use `pop-to-buffer-same-window' in `project-eshell'

* lisp/progmodes/project.el (project-eshell): Use
`pop-to-buffer-same-window' instead of `pop-to-buffer' to match the
behavior of `M-x eshell'.

Make checkdoc--next-docstring use the doc-string-elt property

This follows from a fix for Bug#46918 and a discussion to use
doc-string-elt:
https://lists.gnu.org/archive/html/emacs-devel/2021-03/msg00232.html

* lisp/emacs-lisp/checkdoc.el (checkdoc--next-docstring): Check for a
non-nil doc-string-elt property, instead of hard-coding the
supported symbols.  Use that property to position point at the
doc-string.

Add Tramp sshfs method

* doc/misc/tramp.texi (Top, Configuration): Insert sections 'FUSE-based
methods' and 'FUSE setup' in menu.
(Quick Start Guide): Fix @anchors.  Add doas.  Extend section
'Using @command{rclone}' to 'Using @acronym{FUSE}-based methods'.
(External methods): Remove rclone paragraph.
(FUSE-based methods, FUSE setup): New nodes.
(Predefined connection information): Mention "mount-point".

* etc/NEWS: Mention Tramp sshfs method.
Fix typos and other oddities.

* lisp/net/tramp-fuse.el: New file.

* lisp/net/tramp-rclone.el (tramp-fuse): Require.
(tramp-rclone-file-name-handler-alist): Replace `tramp-rclone-handle-*'
by `tramp-fuse-handle-*' where appropriate.
(tramp-rclone-handle-delete-directory)
(tramp-rclone-handle-delete-file)
(tramp-rclone-handle-directory-files)
(tramp-rclone-handle-file-attributes)
(tramp-rclone-handle-file-executable-p)
(tramp-rclone-handle-file-name-all-completions)
(tramp-rclone-handle-file-readable-p)
(tramp-rclone-handle-insert-directory)
(tramp-rclone-handle-insert-file-contents)
(tramp-rclone-handle-make-directory, tramp-rclone-mount-point)
(tramp-rclone-mounted-p, tramp-rclone-local-file-name):
Remove.  Functionality moved to tramp-fuse.el.
(tramp-rclone-remote-file-name)
(tramp-rclone-maybe-open-connection): Use `tramp-fuse-*' functions.

* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-out-of-band):
Simplify check.

* lisp/net/tramp-sshfs.el: New file.

* lisp/net/tramp.el: Remove TODO item.

* test/lisp/net/tramp-tests.el (tramp--test-sshfs-p): New defun.
(tramp-test14-delete-directory): Use it.

Delete two more items obsoleted in Emacs 23.1

* lisp/calendar/icalendar.el
(icalendar--datetime-to-noneuropean-date): Remove alias obsolete since
* lisp/obsolete/nnir.el (nnir-swish-e-index-file):
Delete items obsolete since Emacs 23.1.

; * etc/NEWS: List removed items.

Normalize version specifiers for make-obsolete and friends

* lisp/auth-source.el (auth-source-forget-user-or-password)
(auth-source-user-or-password, auth-source-hide-passwords):
* lisp/calendar/icalendar.el (icalendar--datetime-to-noneuropean-date):
* lisp/cedet/semantic/db-el.el (semanticdb-elisp-sym-function-arglist):
* lisp/emacs-lisp/debug.el (debugger-insert-backtrace):
* lisp/obsolete/nnir.el (nnir-swish-e-index-file):
* lisp/obsolete/starttls.el (starttls-any-program-available):
Normalize version specifiers for make-obsolete and friends.

* lisp/help-mode.el (help-mode-tool-bar-map): Fix tooltips.

Add new face 'help-key-binding' for keybindings in help

* lisp/faces.el (help-key-binding): New face.
* lisp/help.el
(help-for-help): Rename from 'help-for-help-internal'.  Use
'substitute-command-keys' syntax.
(help): Make into alias for 'help-for-help'.
(help-for-help-internal): Make into obsolete alias for
'help-for-help'.
(help--key-description-fontified): New function to add the
'help-key-binding' face.
(help-key-description, substitute-command-keys)
(describe-map-tree, help--describe-command)
(help--describe-translation, describe-map):
* lisp/help-fns.el (help-fns--key-bindings, describe-mode):
Use above new function.
* lisp/isearch.el (isearch-help-for-help-internal): Use
`substitute-command-keys' syntax.
* lisp/help-macro.el (make-help-screen): Use
'substitute-command-keys' and 'help--key-description-fontified'.
Simplify.
* src/keymap.c (describe_key_maybe_fontify): New function to add
the 'help-key-binding' face to keybindings.
(describe_vector): Use above new keybinding.
(syms_of_keymap) <Qfont_lock_face, Qhelp_key_binding>: New
DEFSYMs.
(fontify_key_properties): New static variable.
* lisp/tooltip.el (tooltip-show): Avoid overriding faces in
specified tooltip text.
* test/lisp/help-tests.el (with-substitute-command-keys-test):
Don't test for text properties.
(help-tests-substitute-command-keys/add-key-face)
(help-tests-substitute-command-keys/add-key-face-listing):
New tests.

Speed up xref rendering for matches on very long lines

* lisp/progmodes/xref.el (xref--insert-xrefs): Cut up the current
line into pieces here for multiple matches's summaries, so that
xref--insert-xrefs can do less work (bug#46859).
(xref--insert-xrefs): Do less work.
(xref--outdated-p):
Update accordingly to how the summary creation logic changed.
(xref--buf-pairs-iterator): Update to the new calling convention.
(xref-location-column): Effectively rename back to
xref-file-location-column since the generic version is now unused.

* 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):
Adjust to the xref-location-column change.
(xref-matches-in-files-trims-summary-for-matches-on-same-line):
New test.

* test/lisp/progmodes/xref-resources/file1.txt:
Change contents slightly to test the new xref--outdated-p code.

Xref test improvements

* test/lisp/progmodes/xref-tests.el
(xref--xref-file-name-display-is-abs):
Fix not to rely on the default value.
(xref-matches-in-files-includes-matches-from-all-the-files):
New test.

* lisp/net/tramp-cache.el: Fix misuse of bound-and-true-p

(tramp-get-file-property, tramp-set-file-property): Check the var's
value rather than its name.

* lisp/net/ange-ftp.el: Fix problem pointed out by compiler warning

(ange-ftp-fix-name-for-bs2000): Remove redundant `boundp` test.

* lisp/erc/erc.el: Fix problem pointed out by compiler warning

[ Also use `read-string` instead of `read-from-minibuffer`.  ]

(erc-part-from-channel): Comment out improbable
reference to the formal argument from within the interactive spec.

* lisp/cedet/semantic/fw.el (semantic-find-file-noselect): Fix warning

Remove ugly hack trying to warn the user about some unknown problem,
and which stopped working in 2013 when files.el started using
lexical-binding.

* lisp/skeleton.el (skeleton-read): Silence compiler warning

* lisp/cedet/semantic/bovine.el: Fix recent regression

The conversion to `lexical-binding` introduced a regression because
`bovine/c.el` relied on inspecting the local variable `lse` in one of
its callers.

(semantic-bovinate-stream): Bind `lse` dynamically, because of
`semantic-parse-region-c-mode`.
(semantic-bovinate-nonterminal-check-map): Rename from
`semantic-bovinate-nonterminal-check-obarray` to hold some other kind
of table.
(semantic-bovinate-nonterminal-check): Use a hash-table instead of an obarray.

* lisp/cedet/semantic/bovine/c.el (semantic-parse-region-c-mode):
Declare use of `lse` via dynamic scoping.

* test/lisp/cedet/semantic-utest-c.el
(semantic-test-c-preprocessor-simulation): Re-enable test.

* lisp/emacs-lisp/bytecomp.el: Warn about unprefixed vars in `boundp`

(byte-compile--check-prefixed-var): New fun,
extracted from `byte-compile--declare-var`.
(byte-compile--declare-var): Use it.
(byte-compile-maybe-guarded): Use it as well.

Remove outline-cycle-minor-mode and outline-cycle-highlight-minor-mode

* lisp/outline.el (outline-font-lock-keywords): Use OVERRIDE or
LAXMATCH depending on outline-minor-mode-highlight in outline-minor-mode.
(outline-minor-mode-cycle, outline-minor-mode-highlight): Promote
defvar to defcustom.
(outline-minor-mode-highlight-buffer): Don't override existing faces.
(outline-cycle-minor-mode, outline-cycle-highlight-minor-mode):
Remove minor modes.

* etc/compilation.txt:
* etc/grep.txt: Enable outline-minor-mode-cycle and
outline-minor-mode-highlight with outline-minor-mode.
https://lists.gnu.org/archive/html/emacs-devel/2021-03/msg00144.html

* test/infra/Dockerfile.emba: Install texinfo.

Tag a semantic test that seems to hang recently

* test/lisp/cedet/semantic-utest-c.el
(semantic-test-c-preprocessor-simulation): Mark as unstable.

Fix string-replace error data

* lisp/subr.el (string-replace): Signal an error with data that is a
list, and whose contents are consistent with other uses of
wrong-length-argument.
* test/lisp/subr-tests.el (string-replace): Test for this.
(subr-test-define-prefix-command): Pacify byte-compiler warnings.

; * test/infra/Dockerfile.emba: Fix last change.

* test/infra/Dockerfile.emba: Touch "info/emacs".

Adapt Dockerfile.emba according to recent configure changes

* test/infra/Dockerfile.emba: Remove "--without-makeinfo" from
configure.  Add "lisp" to make.

* lisp/cedet/semantic/wisent: Use lexical-binding

* lisp/cedet/semantic/wisent/comp.el: lexical-binding.
(wisent-defcontext): Make sure the vars are also dynbound in the files
that `require` us.
(wisent-state-actions, wisent-automaton-lisp-form): Use `obarray-make`.
(wisent--compile-grammar): Rename from `wisent-compile-grammar`.
(wisent-compile-grammar): Redefine as an obsolete function.
(wisent-automaton-lisp-form): Avoid variable `state`.

* lisp/cedet/semantic/grammar.el: Use lexical-binding.
(semantic-grammar-require-form): New var.
(semantic-grammar-header): Use it to provide new element `require-form`.
(semantic-grammar-header-template): Use it.

* lisp/cedet/semantic/wisent.el (wisent-compiled-grammar): New macro.

* lisp/cedet/semantic/wisent/grammar.el (wisent-grammar-parsetable-builder):
Use it in the generated code instead of the `wisent-compile-grammar` function.
(wisent-grammar-mode): Set `semantic-grammar-require-form` so
the generated ELisp files require `semantic/wisent` rather than
`semantic/bovine`.

* lisp/cedet/semantic/wisent/wisent.el: Use lexical-binding.
* lisp/cedet/semantic/wisent/java-tags.el: Use lexical-binding.
* lisp/cedet/semantic/wisent/python.el: Use lexical-binding.
* lisp/cedet/semantic/wisent/javascript.el: Use lexical-binding.
(semantic-ctxt-current-symbol): Remove unused var `symlist`.

* admin/grammars/python.wy (wisent-python-EXPANDING-block):
Declare dynbound var.

* lisp/cedet/semantic/grammar-wy.el: Regenerate.

Remove additional items obsolete since Emacs 22/23

* lisp/speedbar.el (speedbar-update-speed)
(speedbar-navigating-speed): Remove variables obsolete since Emacs 23.
(speedbar-dir-follow, speedbar-directory-buttons-follow): Don't use
above removed variables.

* lisp/erc/erc.el (erc-announced-server-name, erc-process)
(erc-default-coding-system, erc-send-command): Remove variables and
functions obsolete since Emacs 22.

; * etc/NEWS: List removed items.

Remove some items obsolete since Emacs 22/23 from Gnus

* lisp/gnus/gnus-art.el (gnus-article-hide-pgp-hook)
(gnus-treat-strip-pgp, gnus-treat-display-xface):
* lisp/gnus/gnus-msg.el (gnus-inews-mark-gcc-as-read):
* lisp/gnus/gnus-start.el (nnmail-spool-file):
* lisp/gnus/nnmail.el (nnmail-spool-file)
(nnmail-fix-eudora-headers): Remove items obsolete since 22.1.
* lisp/gnus/gnus-art.el (gnus-treat-display-x-face):
* lisp/gnus/gnus-msg.el (gnus-inews-do-gcc): Don't use above obsolete symbols.
* doc/misc/gnus.texi (Washing Mail, Not Reading Mail): Don't refer to
above obsolete variables.
; * etc/NEWS: List removed items.

* lisp/gnus/gnus.el (gnus-local-domain, gnus-carpal):
* lisp/gnus/nnimap.el (nnimap-split-rule):
* lisp/gnus/nntp.el (nntp-authinfo-file): Fix obsolete variable
version format.

Remove some references to Emacs 21

* lisp/erc/erc-track.el (erc-track-position-in-mode-line):
* lisp/erc/erc.el (erc-header-line-format):
* lisp/ibuffer.el (ibuffer-mode):
* lisp/ruler-mode.el: Remove some references to Emacs 21.

* lisp/mouse-drag.el: Use lexical-binding.

* lisp/mouse-copy.el: Use lexical-binding.

* lisp/cedet/semantic/bovine/*.el: Use lexical-binding

* lisp/cedet/semantic/bovine/c.el: Use lexical-binding.
(semantic-lex-cpp-define): Remove unused var `name`.
(semantic-c-do-lex-if): Remove unused var `pt`.
(semantic-analyze-tag-references): Remove unused var `refs`.
(semantic-c-dereference-namespace): Remove unused vars `tmp` and
`usingname`.
(semantic-c-dereference-namespace-alias): Remove unused var `newtype`.
(semantic-c-check-type-namespace-using): Remove unused vars `tmp` and
`shortname`.
(semanticdb-find-table-for-include): Remove unused var `prefix`.
(semantic-default-c-setup, semantic-c-describe-environment):
Use `derived-mode-p`.

* lisp/cedet/semantic/bovine/debug.el: Use lexical-binding.

* lisp/cedet/semantic/bovine/make.el: Use lexical-binding.

* lisp/cedet/semantic/bovine/scm.el: Use lexical-binding.

* lisp/cedet/semantic/lex.el (define-lex-analyzer): Define the var (and
the function) in a single step.

* lisp/obsolete/inversion.el: Use lexical-binding

* admin/admin.el (make-manuals-dist-output-variables): Update.

Simplify silent-rules build machinery

* src/verbose.mk.in: New file.
* configure.ac (AM_V, AM_DEFAULT_V): Remove output variables.
(src/verbose.mk): New output file.
* Makefile.in, admin/charsets/Makefile.in:
* admin/grammars/Makefile.in, admin/unidata/Makefile.in:
* doc/emacs/Makefile.in, doc/lispintro/Makefile.in:
* doc/lispref/Makefile.in, doc/misc/Makefile.in, leim/Makefile.in:
* lib-src/Makefile.in, lib/Makefile.in, lisp/Makefile.in:
* lwlib/Makefile.in, nt/Makefile.in, oldXMenu/Makefile.in:
* src/Makefile.in, src/verbose.mk.in, test/Makefile.in:
Include src/verbose.mk rather than repeatedly defining AM_V_at etc.

* src/Makefile.in (base_obj): Remove GMP_OBJ, undefined since 202007.

Don't pass implicit flags to sub-makes

* Makefile.in (info_misc, uninstall, texi_misc):
Don't pass any implicit make flags to sub-makes.
Ref https://lists.gnu.org/r/help-make/2021-03/msg00007.html

Remove the --without-makeinfo configure option (bug#46837)

* configure.ac (--without-makeinfo): Remove option.
(HAVE_MAKEINFO): Remove output variable.

* Makefile.in (HAVE_MAKEINFO): Remove.
(info_misc): Remove HAVE_MAKEINFO check.
(info-real): Remove target.
(info): Simplify.

; * etc/NEWS: Mention this.

* lisp/cedet/srecode/compile.el: Fix last change

(srecode-compile-inserter): Call `make-instance` properly.

Speed up json.el encoding

This replaces most json-encode-* functions with similar
json--print-* counterparts that insert into the current buffer
instead of returning a string (bug#46761).

Some unused but useful json-encode-* functions are kept for backward
compatibility and as a public API, and the rest are deprecated.

* etc/NEWS: Announce obsoletions.

* lisp/json.el: Document organization of library.  Make subsection
headings more consistent.
(json--encoding-current-indentation): Rename...
(json--print-indentation-prefix): ...to this, to reflect new use.
(json--encode-stringlike, json--encode-alist): Rename...
(json--print-stringlike, json--print-alist): ...to these,
respectively, and encode argument into current buffer instead.  All
callers changed.

(json--print-string, json--print-unordered-map, json--print-array)
(json--print): New functions.
(json-encode-string, json-encode-plist, json-encode-array)
(json-encode): Use them, respectively.

(json-encode-number, json-encode-hash-table): Mark as obsolete
aliases of json-encode.
(json-encode-key, json-encode-list): Mark as obsolete in preference
for json-encode.

(json--print-indentation-depth, json--print-keyval-separator): New
variables.
(json--with-output-to-string): New macro.
(json--print-indentation, json--print-keyword, json--print-key)
(json--print-pair, json--print-map, json--print-list): New
functions.

(json--with-indentation): Use json--print-indentation-depth to avoid
unnecessary string allocation.
(json-encoding-default-indentation, json-pretty-print-max-secs):
Clarify docstrings.
(json--escape, json--long-string-threshold, json--string-buffer):
Remove; no longer used.

* lisp/progmodes/js.el (js--js-encode-value): Replace
json-encode-string and json-encode-number with json-encode.
(js-eval-defun): Use json--print-list to avoid
json-encode-list->insert roundtrip.

* test/lisp/json-tests.el (test-json-encode-number)
(test-json-encode-hash-table, test-json-encode-hash-table-pretty)
(test-json-encode-hash-table-lisp-style)
(test-json-encode-hash-table-sort,  test-json-encode-list):  Replace
uses of obsolete functions with the equivalent use of json-encode.
(test-json-encode-key): Suppress obsoletion warnings.
(test-json-encode-string): Check that text properties are stripped.

* lisp/emacs-lisp/bindat.el (bindat-struct): Fix Edebug def

* lisp/emulation/: Use lexical-binding

* lisp/emulation/cua-base.el: Use lexical-binding.
Remove redundant `:group` arguments.
(cua-mode): Don't use `:require` since the autoload on `define-minor-mode`
takes care of loading the mode when custom-setting it.

* lisp/emulation/cua-gmrk.el: Use lexical-binding.
(cua--copy-rectangle-to-global-mark): Remove unused var `src-buf`.

* lisp/emulation/edt-mapper.el: Use lexical-binding.

* lisp/emulation/edt.el: Use lexical-binding.
Remove redundant `:group` arguments.
(edt-with-position): Allow `top`, `left`, and `far` to be left unused
in `body`.

* lisp/emulation/keypad.el: Use lexical-binding.

* lisp/emulation/viper-cmd.el: Move `provide` to the end.
(viper-read-string-with-history): Strength reduce `eval` to `symbol-value`.

* lisp/emulation/viper-ex.el: Use lexical-binding.
Remove redundant `:group` arguments.
Move `provide` to the end.

* lisp/emulation/viper-init.el: Use lexical-binding.

* lisp/emulation/viper-keym.el (viper-toggle-key): Use `dolist`.
(viper-insert-diehard-map): Use `string`.
(viper-modify-major-mode): Use `alist-get` and `setf`.

* lisp/emulation/viper-macs.el (viper-ex-work-buf):
Move `provide` to the end.
(viper-record-kbd-macro): Strength reduce `eval` to `symbol-value`.
(viper-describe-kbd-macros): Return value is not significant.
(viper-keyseq-is-a-possible-macro): Use `seq-some`.
(viper-common-seq-prefix): Use `seq-every-p`.

* lisp/emulation/viper-mous.el: Use lexical-binding.
Remove redundant `:group` arguments.
Move `provide` to the end.
(viper-remember-current-frame): Accept arbitrary ignored args.
(viper-parse-mouse-key): Strength reduce `eval` to `symbol-value`.
Remove unused var `key-spec`.
(viper-bind-mouse-search-key, viper-bind-mouse-insert-key):
Apply de Morgan.

* lisp/emulation/viper-util.el: Move `provide` to the end.
(viper-move-marker-locally, viper-push-onto-ring, viper-save-setting):
Strength reduce `eval` to `symbol-value`.
(viper-event-vector-p, viper-char-symbol-sequence-p, viper-char-array-p):
Use `seq-every-p`.

* lisp/emulation/viper.el (viper-non-hook-settings): Eta-reduce use of
`viper-remember-current-frame`.

Various map.el improvements

* lisp/emacs-lisp/seq.el (seq-do-indexed): Return nil as per doc.

* lisp/emacs-lisp/map.el: Require Emacs >= 26 due to dependence on
5-arg alist-get.  Bump package to version 3.0.  Fix other
headers.  (Bug#46754)
(map--plist-p): Detect list starting with nil as plist, not alist.
(map-elt, map-filter, map-apply, map--make-pcase-bindings)
(map--make-pcase-patterns): Simplify.
(map-let, map-put, map-nested-elt, mapp): Update docstring for plist
support.
(map-delete): Fix OBOE on arrays.  Split into cl-defmethods.
(map-values, map-values-apply): Specialize for arrays.
(map-pairs, map-keys-apply, map-put!): Improve docstring.
(map-length): Clarify docstring w.r.t. duplicate keys.  Split into
cl-defmethods.  Optimize default implementation.
(map-copy): Use copy-alist on alists.  Split into cl-defmethods.
(map-contains-key): Add plist support.  Clarify docstring
w.r.t. optional argument.  Simplify default implementation.
(map-some, map-every-p, map-merge, map-merge-with, map--into-hash):
Don't use map-apply for side effects.
(map-into): Preserve plist ordering.  Improve docstrings.
(map-insert): Add hash-table and array support.
(map-inplace): Remove unused error symbol.
(map-do): Return nil as per doc.

* etc/NEWS: Announce new user-visible behavior.

* test/lisp/emacs-lisp/map-tests.el: Prefer should-not
over (should (not ...)) in general.
(with-maps-do): Fix docstring.
(with-empty-maps-do): New macro.
(test-map-elt-default, test-mapp, test-map-keys, test-map-values)
(test-map-pairs, test-map-length, test-map-copy, test-map-apply)
(test-map-do, test-map-keys-apply, test-map-values-apply)
(test-map-filter, test-map-remove, test-map-empty-p)
(test-map-contains-key, test-map-some, test-map-every-p):
Use it.

(test-map-plist-p, test-map-put!-new-keys, test-map-insert-empty)
(test-map-insert, test-map-delete-empty, test-map-copy-alist)
(test-map-contains-key-testfn, test-map-into-hash-test)
(test-map-into-empty, test-map-merge, test-map-merge-empty):
New tests.

(test-map-elt): Test array key that is within bounds but not fixnum.
(test-map-put!): Use map--plist-p.  Remove redundant tests.
(test-map-put-alist-new-key): Don't modify list literal.
(test-map-put-testfn-alist, test-map-put-return-value): Silence
obsoletion warnings.
(test-map-delete): Check for OBOE on arrays.
(test-map-delete-return-value): Remove test made redundant by
test-map-delete.
(test-map-nested-elt, test-map-into): Test plists too.

CC Mode: Fix calculation of c-parse-state when there're macros with braces

This fixes bug #46951.

* lisp/progmodes/cc-engine.el (c-append-lower-brace-pair-to-state-cache):
Ensure the starting point for backward scanning is not within a macro which
doesn't contain HERE.

* lisp/progmodes/flymake.el (flymake-log): Push the right code

* lisp/progmodes/flymake.el (flymake-log): Simplify

Revert "Fix Makefile subshell output when run in parallel"

This reverts commit 117505454ce04c0c0ce2c2b4058823cf764fc2eb.
It breaks the build for versions of GNU Make that don't support -O.

Fix Makefile subshell output when run in parallel

For discussion, see the following thread:
https://lists.gnu.org/r/emacs-devel/2021-03/msg00255.html

* Makefile.in (texi_misc): Avoid interspersing parallel Make output
with that from subshell.

Pacify some semantic-tag-make-plist warnings

* lisp/cedet/semantic/tag.el (semantic-tag-make-plist): Define
before its first use to pacify some recent "may not be defined at
runtime" warnings after turning on lexical-binding.

Remove mention of using defun- and defvar- as prefixes

* doc/lispref/tips.texi (Coding Conventions): Remove mention of
using defun- and defvar- as prefixes, as this is something that we
rarely do in Emacs (bug#46899).

; Fix last change.

Improve documentation of Bindat

* doc/lispref/processes.texi (Bindat Types, Bindat Functions)
(Bindat Computed Types): Improve wording and add indexing.

* etc/NEWS: Add a pointer to the ELisp manual for "Bindat".

Pull Modus themes version 1.2.3 from upstream

This syncs with the following upstream revision:

Update to version 1.2.3
0a36239 2021-03-05 19:43:30 +0200
https://gitlab.com/protesilaos/modus-themes/-/commit/0a36239baf908585cdf32c6188eb86713d9bf6c6

For discussion, see bug#45068 and the following upstream issue:
https://gitlab.com/protesilaos/modus-themes/-/issues/162

* doc/misc/modus-themes.org:
* etc/themes/modus-operandi-theme.el:
* etc/themes/modus-themes.el:
* etc/themes/modus-vivendi-theme.el: Update to version 1.2.3.

Update Modus themes to their version 1.2.0

* doc/misc/modus-themes.org: Add new version of the manual, with
changes to markup and references to the latest state of the project.

* etc/themes/modus-vivendi-theme.el:
* etc/themes/modus-operandi-theme.el: Provide updated version of each
theme, which expands the contents of 'modus-themes.el' (bug#45068).

* etc/themes/modus-themes.el: Add new supportive file.  This is where
theme data, functions, and face definitions are defined.

Conditionally use macroexp-file-name in Flymake

* lisp/progmodes/flymake.el (flymake-log): Reinstate Emacs 26
support by conditionally using macroexp-file-name which is new in
Emacs 28 (bug#46957).

* * lisp/cedet/semantic: Use lexical-binding in the generated grammars

* admin/grammars/c.by (typesimple): Bind `semantic-c-classname` dynamically.

* lisp/cedet/semantic/bovine.el: Use lexical-binding.
(semantic-lambda): Silence warnings if the `vals` arg is not used.

* lisp/cedet/semantic/grammar-wy.el: Re-generate.

* lisp/cedet/semantic/bovine/grammar.el: Use lexical-binding.
(bovine-grammar-expand-action): Silence warnings if some of the
`vals`, `start`, or `end` args is not used.
(bovine--make-parser-1): Use lexical-binding in the generated files.

* lisp/cedet/semantic/wisent/grammar.el: Use lexical-binding.
(wisent--make-parser-1): Use lexical-binding in the generated files.

; Fix typo.

Add some new tests for keymap.c

* test/src/keymap-tests.el (keymap-define-key/undefined)
(keymap-define-key/keyboard-macro, keymap-define-key/lambda)
(keymap-define-key/keymap, keymap-define-key/menu-item)
(keymap-lookup-key/list-of-keymaps, keymap-lookup-key/too-long):
New tests.
(keymap-lookup-key): Extend test slightly.

* lisp/cedet/srecode/*.el: Use lexical-binding

* lisp/cedet/srecode/compile.el (srecode-compile-inserter):
Use `make-instance` instead of the class name-as-function.

* lisp/cedet/srecode/fields.el (srecode-field-behind-hook):
Remove unused var `field`.

* lisp/cedet/srecode/find.el (srecode-load-tables-for-mode): Simplify.

* lisp/cedet/srecode/getset.el (srecode-semantic-selected-tag): Declare var.

* lisp/cedet/srecode/mode.el (srecode-minor-mode): Mark references to
non-existing `srecode-m3-items` function.

* lisp/cedet/srecode/srt-mode.el (srecode-parse-this-macro): Remove
unused var `raw`.

Bindat: new macro-expansion based data layout language

Thorough redesign of the Bindat system, which makes it possible
to define new Bindat type forms, define recursive types, control
the values returned when unpacking, freely mix arbitrary computations
with type definitions, as well as support for arbitrary sized
integers.

This also reverts the recent addition of the `bindat-spec` macro and
the support for 64bit integers in the old Bindat language since that
is now considered obsolete anyway.

* doc/lispref/processes.texi (Bindat Types): Rename from `Bindat Spec`
and rewrite for the new sublanguage.
(Bindat Functions): Adjust to the new terminology.
(Bindat Computed Types): New node.

* lisp/emacs-lisp/bindat.el (bindat--type): New type.
(bindat--unpack-u64, bindat--unpack-u64r): Delete functions.
(bindat--unpack-item, bindat--pack-item, bindat--fixed-length-alist):
Revert addition of support for 64bit integers.
(bindat--unpack-group, bindat--length-group, bindat--pack-group):
Handle the new `bindat--type` values.
(bindat-spec): Revert addition of this macro.
(bindat--unpack-uint, bindat--unpack-uintr, bindat--pack-uint)
(bindat--pack-uintr): New functions.
(bindat-type, bindat-defmacro, bindat--pcase): New macros.
(bindat-type): New Edebug elem.
(bindat--type): New generic function.
(bindat--primitives): New constant.
(bindat--macroenv, bindat--op): New vars.
(bindat--make-docstring, bindat--fun, bindat--makefun, bindat--toplevel):
New functions.

* test/lisp/emacs-lisp/bindat-tests.el: Use `bindat-type`.
(ip): New Bindat type.
(header-bindat-spec, data-bindat-spec, packet-bindat-spec): Adjust to
new `bindat-type` macro.
(bindat-test-unpack): Simplify now that the order of fields is preserved.
(bindat-test--int-websocket-type, bindat-test--LEB128): New consts.
(bindat-test--pack-val, bindat-test--sint, bindat-test--recursive):
New tests.

Make lambda-lifting work again

* lisp/emacs-lisp/cconv.el (cconv--analyze-use): Fix typo.
* test/lisp/emacs-lisp/cconv-tests.el (cconv-convert-lambda-lifted):
Add test case.

Improve rcirc-authenticated-hook docstring

* lisp/net/rcirc.el (rcirc-authenticated-hook): Improve docstring.

* lisp/emacs-lisp/bindat.el: Minor refactoring

(bindat--unpack-str, bindat--unpack-strz, bindat--unpack-bits):
New functions, extracted from `bindat--unpack-item`.
(bindat--unpack-item): Use them.
(bindat--align): New function.
(bindat--unpack-group, bindat--length-group, bindat--pack-group): Use it.
(bindat-get-field): Allow integers to index both lists (as returned by
`repeat`) and vectors (as returned by `vec`).
(bindat--pack-str, bindat--pack-bits): New functions, extracted from
`bindat--pack-item`.
(bindat--pack-item): Use them.

* test/lisp/emacs-lisp/bindat-tests.el (struct-bindat): Place the fields
in the order in which they appear in the structs.

* src/fns.c (Frandom): Handle bignum `limit`s

(ccall2, get_random_bignum): New functions.

Declare some completion predicates

* lisp/filenotify.el (file-notify-handle-event):
* lisp/net/dbus.el (dbus-handle-event): Declare `completion-predicate'.

* doc/misc/tramp.texi (Remote shell setup): Fix reference.

Improve the documentation of :extra in cl-defmethod

* doc/lispref/functions.texi (Generic Functions): Improve
documentation of :extra (bug#46917).

* lisp/emacs-lisp/cl-generic.el (cl-defmethod): Ditto.

Fix qualifiers order for loadhist-unload-element in elp.el

* lisp/emacs-lisp/elp.el (loadhist-unload-element): The :extra
qualifier is expected to come before the other qualifiers, so do
that (bug#46917).

Restrict the version guesser to top-level headings

* lisp/help-fns.el (help-fns--first-release): Restrict the version
guesser to top-level section -- looking in all headings leads to
false positives (bug#46889).