* lisp/tab-bar.el: New faces and face options.

* lisp/tab-bar.el (tab-bar-tab-group-current)
(tab-bar-tab-group-inactive, tab-bar-tab-ungrouped): New deffaces.
(tab-bar-tab-face-function): New defcustom.
(tab-bar-tab-face-default): New function.
(tab-bar-tab-name-format-default): Use it.
(tab-bar-tab-group-format-default): Use tab-bar-tab-group-inactive face.
(tab-bar-tab-group-face-function): New defcustom.
(tab-bar-tab-group-face-default): New function.
(tab-bar--format-tab-group): Add new arg 'current-p'.
(tab-bar-format-tabs-groups): Prepend current group name before first tab.
Override tab-bar-tab-face-function with tab-bar-tab-group-face-function.

Stop project-root from going into infinite recursion

* lisp/progmodes/project.el (project--within-roots-fallback):
New variable.
(project-root, project-roots): Use it (bug#47168).

; Remove traces from tramp-tests.el

New commands xref-next-line-no-show and xref-prev-line-no-show (bug#44611)

* lisp/progmodes/xref.el (xref-next-line-no-show)
(xref-prev-line-no-show): New commands.
(xref-next-line, xref-prev-line): Use them.

Minor fixes

* lisp/frame.el (set-frame-property--interactive): Remove '(point)'
that makes no sense as the default value.  (Bug#9970)

* lisp/simple.el (next-error-found-function): Move defcustom
closer to function 'next-error-found' where it's used.

* lisp/tab-bar.el (tab-bar-select-tab): Support negative arg.

* lisp/tab-bar.el: Simplify internal functions.

* lisp/tab-bar.el (tab-bar-tabs-set): New function.
(tab-bar-tabs): Use tab-bar--current-tab-find and tab-bar-tabs-set.
(tab-bar--tab): Use tab-bar--current-tab-find.
(tab-bar--current-tab): Remove unused line (assq 'current-tab ...)
because there is no current-tab when it's called.  Remove unused arg 'frame'.
(tab-bar--current-tab-find): Simplify.
(tab-bar-move-tab-to, tab-bar-move-tab-to-frame)
(tab-bar-new-tab-to, tab-bar-close-tab)
(tab-bar-close-other-tabs, tab-bar-undo-close-tab)
(tab-switcher-delete-from-list): Use tab-bar-tabs-set
instead of set-frame-parameter.
(tab-bar-close-group-tabs): Simplify using tab-bar--current-tab-find
without arg.

Fix problem of image-tests.el on emba

* test/README: Mention $EMACS_TEST_DIRECTORY.

* test/lisp/image-tests.el (image-tests--emacs-images-directory):
Use `data-directory', for runs w/o of make.
(image-type/from-filename): Check for `image-load-path'.

Fix problem in Tramp running two async processes in parallel

* lisp/net/tramp-integration.el
(tramp-compile-disable-ssh-controlmaster-options): New defun.  Add
it to `compilation-mode-hook'.  (Bug#45518)

* lisp/progmodes/compile.el (compilation-get-file-structure):
Revert commit 4ce5646d59, it isn't needed.

; Further traces in tramp-tests.el

; Trace variables in tramp-tests.el

* etc/themes/modus-themes.el: Bump version for GNU ELPA release

(News:): New section.

Add minibuffer input support to commands that set the frame size

* lisp/frame.el (set-frame-property--interactive): Internal function to
produce the interactive form of `set-frame-width' and
`set-frame-height'.  Offer the current size as default.  (Bug#9970)
* src/frame.c (Fset_frame_height): Modify to call
`set-frame-property--interactive'.
(Fset_frame_width): Modify to call `set-frame-property--interactive'.
* doc/lispref/frames.texi (Frame Size): Update the manuals.
* etc/NEWS: Advertise the change (bug#9970).

* lisp/tab-bar.el (tab-bar-new-tab-group): New defcustom.

(tab-bar--current-tab, tab-bar-new-tab-to, tab-bar-duplicate-tab): Use it.

* lisp/tab-bar.el (tab-bar-tab-group-format-function): New defcustom.

(tab-bar-tab-group-default): New function.
(tab-bar-tab-group-format-default, tab-bar-format-tabs-groups)
(tab-bar-change-tab-group, tab-bar-close-group-tabs): Use it.

* CONTRIBUTE: Refer to gnulib for request-assign.future.

The vast majority of the exchanges on this topic are "please send me
the form; ok I sent you the form", and there's no need to involve a
mailing list for that.

Make the `kbd` macro work in both Emacs-26 and Emacs-28

This is so that elpa.gnu.org's Emacs-26 can successfully build the
Info version of it for the GNU ELPA package.

Improve command completion in tramp-crypt.el

* lisp/net/tramp-crypt.el (tramp-crypt-command-completion-p):
Rename from `tramp-crypt-enabled-p'.  Handle
`tramp-crypt-remove-directory' special.

; Silence byte-compiler after previous commit

* lisp/textmodes/refill.el: Use lexical-binding.

* lisp/cedet: Convert remaining files to lexical-binding

Remove a few more redundant `:group` args.
Make use of lexical scoping to replace `(lambda...) with proper closures.

* lisp/cedet/ede/custom.el (ede-project-sort-targets-list):
Use `dotimes` and replace `(lambda..) with closures.

* lisp/cedet/ede/proj-comp.el (proj-comp-insert-variable-once):
* lisp/cedet/ede/pmake.el (ede-pmake-insert-variable-once):
Remove unused var `addcr`.

* lisp/cedet/semantic/complete.el: Use lexical-binding.
(semantic-displayer-show-request): Remove unused var `typing-count`.
Use `equal` instead of `stringp+string=`.

* lisp/cedet/semantic/db-ebrowse.el: Use lexical-binding.
(semanticdb-create-ebrowse-database): Remove unused vars `mma` and `regexp`.
(semanticdb-ebrowse-strip-trees): Remove unused var `class` and `filename`.
(semanticdb-ebrowse-add-globals-to-table): Remove unused var `fname`.

* lisp/cedet/semantic/db-find.el: Use lexical-binding.
(semanticdb-find-adebug-insert-scanned-tag-cons): Remove always-nil var
`tip`.

* lisp/cedet/semantic/db-global.el: Use lexical-binding.
(semanticdb-enable-gnu-global-databases): Access local var
`semantic--ih` by sticking its value in the code passed to `eval`
rather than by dynamic scoping.

* lisp/cedet/semantic/db-typecache.el: Use lexical-binding.
(semanticdb-db-typecache-dump): Remove unused var `junk`.

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

* lisp/cedet/semantic/dep.el: Use lexical-binding.
(semantic-add-system-include): Avoid `add-to-list` on a local variable.
Access local var `value` by sticking its value in the code passed to
`eval` rather than by dynamic scoping.
(semantic-remove-system-include): Don't use `delete` on a list received
from elsewhere.
Access local var `value` by sticking its value in the code passed to
`eval` rather than by dynamic scoping.
(semantic-reset-system-include): Simplify a bit.

* lisp/cedet/semantic/ede-grammar.el: Use lexical-binding.
(project-compile-target): Remove unused vars `csrc` and `cb`.
Use `cl-incf`.  Remove apparently unneeded `with-no-warnings`.

* lisp/cedet/semantic/edit.el: Use lexical-binding.
(semantic-edits-change-over-tags): Remove unused var `inner-start`.
(semantic-edits-incremental-parser-1): Silence warnings about
intentionally unused var `last-cond`.

* lisp/cedet/semantic/fw.el: Use lexical-binding.
(recentf-exclude, semantic-init-hook, ede-auto-add-method)
(flymake-start-syntax-check-on-find-file, auto-insert): Declare vars.

* lisp/cedet/semantic/ia-sb.el: Use lexical-binding.
(semantic-ia-sb-key-map): Move initialization into declaration.
(semantic-ia-sb-more-buttons): Remove unused var `idx`.
(semantic-ia-sb-line-path): Simplify `if` -> `or`.

* lisp/cedet/semantic/idle.el (semantic-idle-breadcrumbs--tag-function):
Make it a function returning a closure.

* lisp/cedet/semantic/senator.el: Use lexical-binding.
(senator-search-set-tag-class-filter): Replace `(lambda..) with a closure.

* lisp/cedet/semantic/sort.el: Use lexical-binding.
(semanticdb-search-system-databases): Declare var.
(semantic-tag-external-member-children-default): Replace `(lambda..)
with a closure.

* lisp/cedet/semantic/tag-ls.el: Use lexical-binding.
(semantic-tag-protection-default, semantic-tag-abstract-p-default):
Simplify with `member`.

* lisp/cedet/semantic/util.el: Use lexical-binding.
(semantic-something-to-tag-table): Declare function
`semanticdb-abstract-table--eieio-childp` called via `cl-typep`.

* lisp/cedet/semantic/bovine/scm.el (semantic-default-scheme-setup):
Remove duplicate setting of `imenu-create-index-function`.

* lisp/cedet/semantic/decorate/mode.el (semantic-decoration-build-style-menu):
Replace `(lambda..) with a closure.

* lisp/cedet/srecode/cpp.el (srecode-semantic-apply-tag-to-dict):
Remove always-t variable `member`.

* lisp/cedet/srecode/mode.el (srecode-minor-mode-templates-menu):
Replace `(lambda..) with a closure.  Use `push`.

* lisp/cedet/semantic/chart.el: Use lexical-binding.
* lisp/cedet/semantic/db-debug.el: Use lexical-binding.
* lisp/cedet/semantic/db-el.el: Use lexical-binding.
* lisp/cedet/semantic/db-file.el: Use lexical-binding.
* lisp/cedet/semantic/db-javascript.el: Use lexical-binding.
* lisp/cedet/semantic/db-mode.el: Use lexical-binding.
* lisp/cedet/semantic/db-ref.el: Use lexical-binding.
* lisp/cedet/semantic/decorate.el: Use lexical-binding.
* lisp/cedet/semantic/doc.el: Use lexical-binding.
* lisp/cedet/semantic/find.el: Use lexical-binding.
* lisp/cedet/semantic/format.el: Use lexical-binding.
* lisp/cedet/semantic/html.el: Use lexical-binding.
* lisp/cedet/semantic/ia.el: Use lexical-binding.
* lisp/cedet/semantic/imenu.el: Use lexical-binding.
* lisp/cedet/semantic/java.el: Use lexical-binding.
* lisp/cedet/semantic/mru-bookmark.el: Use lexical-binding.
* lisp/cedet/semantic/symref.el: Use lexical-binding.
* lisp/cedet/semantic/tag-file.el: Use lexical-binding.
* lisp/cedet/semantic/tag-write.el: Use lexical-binding.
* lisp/cedet/semantic/texi.el: Use lexical-binding.
* lisp/cedet/semantic/util-modes.el: Use lexical-binding.

Init archive and add noconfirm to 'package-install-selected-packages'

* lisp/emacs-lisp/package.el (package-install-selected-packages):
Add call to 'package--archives-initialize' and add optional argument
NOCONFIRM to skip user confirmation when installing packages.  (Bug#47124)

* lisp/vc/ediff-vers.el: Remove XEmacs compat code.

Use lexical-binding in expand.el

* lisp/expand.el: Use lexical-binding.  Remove redundant :group args.

* lisp/help-macro.el: Use lexical-binding.

Add three new tests for image.el

* test/lisp/image-tests.el (image-find-image)
(image-type-from-file-name, image-type/from-filename): New tests.

* lisp/wid-edit.el (widget-field): Add subtle border to face.

Revert "* lisp/calendar/appt.el (appt-activate): Set the local `write-file-functions`"

This reverts commit 587a97bcb23bc6ea429ab790efa03f2260a9bca8.
We really do want to affect the global part of the hook.
Reported by Gabriel <gabriel376@hotmail.com>.

* lisp/tab-bar.el: Tab groups can be displayed with tab-bar-format-tabs-groups

* lisp/tab-bar.el (tab-bar-format): Turn defvar into defcustom.
Add :options and force-mode-line-update in :set.
(tab-bar--format-tab): New function refactored from tab-bar-format-tabs.
(tab-bar-format-tabs): Move most of code to tab-bar--format-tab and call it.
(tab-bar-tab-group-format-function): New defcustom.
(tab-bar-tab-group-format-default): New function.
(tab-bar--format-tab-group, tab-bar-format-tabs-groups): New functions.
(tab-bar-format-align-right, tab-bar-format-global): Shorten id.
(tab-bar-change-tab-group): Add refs to tab-bar-format in docstring.

* lisp/tab-line.el: Update docstring of 'tab-line-tabs-function' (bug#47117)

(tab-line-tabs-function): Mention 'tab-line-tabs-buffer-groups'
in the docstring.
(tab-line-tabs-buffer-groups): Add docstring.

* lisp/tab-line.el: Add face for group-tab (bug#47118)

(tab-line-tab-face-functions): Add choice for 'tab-line-tab-face-group'.
(tab-line-tab-group): New face.
(tab-line-tabs-buffer-groups): Set alist key 'group-tab' for group tabs.
(tab-line-tab-face-group): New function to set face for group tabs.

* lisp/net/tramp-crypt.el (tramp-crypt-add-directory):

Don't autoload setting property `completion-predicate'.

Fix buffer overflow in xbm_scan (bug#47094)

* src/image.c (xbm_scan): Ensure reading a string doesn't overflow the
buffer.

Separate values 'override' and 'append' in 'outline-minor-mode-highlight'

* lisp/outline.el (outline-font-lock-keywords): Handle 'override' and 'append'
separately.
(outline-minor-mode-highlight): Separate values 'override' and 'append'.
(outline-minor-mode-highlight-buffer): Go to match-beginning
before checking '(point)'.

Add help-key-binding styling to wombat theme

* etc/themes/wombat-theme.el (help-key-binding): Add face
definition.

; Add comment for a recent change

* lisp/faces.el (help-key-binding): Comment on the reason for a
recent change.

Fix rare redisplay glitches when image has been removed from display

* src/dispnew.c (update_window): Make sure all glyph rows below
the last visible one are marked as invalid, even when the loop
which "updates the rest of the lines" didn't examine the last
visible row.  (Bug#47093)

Adjust colors of help-key-binding face for readability

* lisp/faces.el (help-key-binding): Adjust colors for improved
readability, and use a flat :box for highlighting (with negative
:line-width height to avoid any vertical resizing of the minibuffer).

This was discussed in:
https://lists.gnu.org/r/emacs-devel/2021-03/msg00535.html

Remove ;;;###tramp-autoload cookie from Tramp defcustoms (Bug#47063)

* lisp/net/tramp-crypt.el (tramp-crypt-enabled-p): New defun.
(tramp-crypt-add-directory, tramp-crypt-remove-directory):
Add property `completion-predicate'.

* lisp/net/tramp-sh.el (tramp-terminal-type, tramp-remote-path)
(tramp-remote-process-environment): Remove.  Move them to ...

* lisp/net/tramp.el: ... here.

Extend support for faces in Enriched mode

* lisp/textmodes/enriched.el (enriched-face-ans): Support faces
with bold and italic attributes.  (Bug#46507)

* src/keyboard.c parse_solitary_modifier): Accept `click` modifier

Fix simple-tests--undo*

* test/lisp/simple-tests.el (simple-tests--undo-in-region,
simple-tests--undo-equiv-table): Re-enable in batch mode.
Enable 'transient-mark-mode' in temp buffer.

* lisp/filesets.el: Address byte-compiler warning

(filesets-run-cmd): Let-bind `filesets--files`.
(filesets-cmd-isearch-getargs): Use it.

* lisp/tooltip.el (tooltip): Restore group that was not "redundant".

Merge from origin/emacs-27

02a5cfce47 (origin/emacs-27) * lisp/mouse.el: Fix mouse-1-clock-follo...
c881e990e3 * lisp/emacs-lisp/gv.el (edebug-after): Don't run the gett...

; Merge from origin/emacs-27

The following commit was skipped:

9f09083bcd * doc/misc/tramp.texi (Remote shell setup): Fix reference....

Merge from origin/emacs-27

fc83f37951 Fix initialization of 'while-no-input-ignore-events'
8f603da44c Update documentation of reading passwords

; Merge from origin/emacs-27

The following commits were skipped:

ed2b23ecc1 Improve the 'dired-do-kill-lines' doc string
8c93becb35 (emacs-27) ; Auto-commit of loaddefs files.

Merge from origin/emacs-27

2c5f215419 Avoid crashes in Mew due to corrupted tool-bar label
7a23915618 * lisp/tooltip.el (tooltip): Doc fix for GTK.
c4bbe02cc4 * lisp/help.el (help-for-help-internal): Doc fix; use impe...

# Conflicts:
# lisp/help.el
# lisp/tooltip.el

Skip recent undo tests in batch mode for now

* test/lisp/simple-tests.el (simple-tests--undo-in-region):
Split into separate test.  Skip in batch mode for now.
(simple-tests--undo-equiv-table): Skip in batch mode for now.

* lisp/cedet/{*.el,ede/*.el}: Use lexical-binding

Remove a few redundant `:group` arguments as well.

* lisp/cedet/ede.el: Use lexical-binding.
Don't load `ede/files` at compile-time.
(ede-speedbar): Declare function.
(ede-load-project-file): Allow `rootreturn` to be a reference rather
than a symbol.
(ede-initialize-state-current-buffer): Pass `ROOT` as a reference
rather than a symbol to `ede-directory-get-open-project` and
`ede-load-project-file` so we don't need to make it dynamically scoped.
(ede-flush-deleted-projects): Avoid `add-to-list` on a local var.

* lisp/cedet/ede/files.el: Use lexical-binding.
(ede-directory-get-open-project): Allow `rootreturn` to be a reference
rather than a symbol.
(ede-project-root-directory): Remove unused var `root`.
(ede-expand-filename-impl): Remove unused vars `path` and `proj`.

* lisp/cedet/cedet-idutils.el: Use lexical-binding.
(cedet-idutils-search): Remove always-nil variable `scopeflags`.

* lisp/cedet/data-debug.el: Use lexical-binding.
(data-debug-insert-overlay-button, data-debug-insert-overlay-list-button)
(data-debug-insert-buffer-button, data-debug-insert-buffer-list-button)
(data-debug-insert-process-button): Remove always-nil variable `tip`.
(data-debug-insert-ring-button): Remove unused var `ringthing`.
(data-debug-insert-widget-properties): Remove unused var `type`.

* lisp/cedet/semantic.el: Use lexical-binding.
(semantic-mode): Strength-reduce `eval` to `symbol-value`.

* lisp/cedet/ede/custom.el: Use lexical-binding.
(ede-project-sort-targets): Remove unused vars `count`, `current`, and
`order`.

* lisp/cedet/ede/pconf.el: Use lexical-binding.
(ede-proj-configure-synchronize): Remove unused var `add-missing`.

* lisp/cedet/ede/pmake.el (ede-proj-makefile-garbage-patterns):
Simplify via η-reduction.
(ede-proj-makefile-dependencies): Use `seq-some` rather than `eval+or`.

* lisp/cedet/ede/proj-elisp.el: Use lexical-binding.
(project-compile-target): Remove unused var `elc`.
(ede-update-version-in-source): Remove unused var `match`.
(project-compile-target): Declare function `cedet-update-autoloads`
from file we don't have.

* lisp/cedet/cedet-cscope.el: Use lexical-binding.
* lisp/cedet/cedet-files.el: Use lexical-binding.
* lisp/cedet/cedet-global.el: Use lexical-binding.
* lisp/cedet/cedet.el: Use lexical-binding.
* lisp/cedet/ede/auto.el: Use lexical-binding.
* lisp/cedet/ede/autoconf-edit.el: Use lexical-binding.
* lisp/cedet/ede/config.el: Use lexical-binding.
* lisp/cedet/ede/cpp-root.el: Use lexical-binding.
* lisp/cedet/ede/detect.el: Use lexical-binding.
* lisp/cedet/ede/generic.el: Use lexical-binding.
* lisp/cedet/ede/linux.el: Use lexical-binding.
* lisp/cedet/ede/locate.el: Use lexical-binding.
* lisp/cedet/ede/makefile-edit.el: Use lexical-binding.
* lisp/cedet/ede/proj-info.el: Use lexical-binding.
* lisp/cedet/ede/proj-obj.el: Use lexical-binding.
* lisp/cedet/ede/proj-prog.el: Use lexical-binding.
* lisp/cedet/ede/proj-shared.el: Use lexical-binding.
* lisp/cedet/ede/proj.el: Use lexical-binding.
* lisp/cedet/ede/shell.el: Use lexical-binding.
* lisp/cedet/ede/simple.el: Use lexical-binding.
* lisp/cedet/ede/source.el: Use lexical-binding.
* lisp/cedet/ede/speedbar.el: Use lexical-binding.
* lisp/cedet/ede/util.el: Use lexical-binding.

Tramp sshfs fixes

* doc/misc/tramp.texi (FUSE setup): Fix typo.

* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-set-file-modes):
Use `tramp-compat-set-file-modes'.

* test/lisp/net/tramp-tests.el
(tramp-test43-asynchronous-requests): Don't run for tramp-sshfs.

; Fix typos in doc strings

Document how to create a branch for Git/Mercurial

* doc/emacs/maintaining.texi (Creating Branches): Add instructions
for git/Mercurial.

* lisp/emacs-lisp/cconv.el (cconv--analyze-use): Simplify (doh!)

* lisp/emacs-lisp/cconv.el (cconv--analyze-use): Tune down the warning

Don't warn for always-nil bindings if the binding is made explicit.
Fixes bug#47080.

* lisp/emacs-lisp/syntax.el (syntax-propertize-rules): Use `macroexp-let2`

This also silences the recently introduced compilation warning.

Rename to image--transform-smoothing in image-mode.el

* lisp/image-mode.el (image--transform-smoothing): Rename from
image-transform-smoothing.
(image-transform-properties, image-transform-reset): Adjust usage.

Add a new `image-transform-smoothing' user option

* doc/lispref/display.texi (Image Descriptors): Document it.
* lisp/image.el (image-transform-smoothing): New user option.
(create-image): Use it.
(image--default-smoothing): New function.

Fix compilation warning in python-wy.el after lexical rewrite

* admin/grammars/python.wy: Require semantic/tag.

In end of data:
cedet/semantic/wisent/python-wy.el:862:1: Warning: the function
    `semantic-tag-name' might not be defined at runtime.

Make byte-compiled uses of `define-minor-mode' more compatible

* lisp/emacs-lisp/easy-mmode.el (define-minor-mode): Be more
defensive about accessing minor mode variables.

; Fix some typos.

Map redo records for undo in region to 'undo-in-region

* lisp/simple.el (undo-equiv-table): Add explaination for
undo-in-region, undo to the beginning of undo list and null undo.
(undo): If equiv is 'undo-in-region, empty or t, set pending-undo-list
to t.  If the redo is undo-in-region, map buffer-undo-list to
'undo-in-region instead of t, if it is an identity mapping, map to
'empty.
(undo-make-selective-list): Only continue when ulist is a proper list.
* test/lisp/simple-tests.el (simple-tests--undo): Add test for
undo-only in region.
(simple-tests--sans-leading-nil): New helper function.
(simple-tests--undo-equiv-table): New test for 'undo-equiv-table'.

* lisp/mail/: Use lexical-binding

Remove some redundant `:group` args as well.

* lisp/mail/supercite.el: Use lexical-binding.
(completer-disable): Declare var.
(sc-set-variable): Don't rely on dynbind to access `help` variable.

* lisp/mail/mail-extr.el: Use lexical-binding.
(mail-extract-address-components): Avoid use of dynamic scoping to
refer to local vars.

* lisp/mail/mailabbrev.el: Use lexical-binding.
(mail-abbrev-make-syntax-table): Rename `_` variable to `syntax-_`.

* lisp/mail/mailheader.el: Use lexical-binding.
(headers): Don't declare as dynbound globally.
(mail-header-set, mail-header-merge): Declare `headers` as dynbound
locally, instead.  Mark those functions as obsolete.
(mail-header-format): Use `alist-get` instead of `mail-header`.

* lisp/mail/binhex.el (binhex-decode-region-external): Remove always-nil
var `firstline`.

* lisp/mail/emacsbug.el: Use lexical-binding.
(report-emacs-bug): Remove always-nil var `message-end-point`.

* lisp/mail/rmail-spam-filter.el: Use lexical-binding.
(bbdb/mail_auto_create_p): Declare variable.

* lisp/mail/rmail.el (rmail-get-new-mail): Remove always-nil var
`delete-files`.

* lisp/mail/rmailout.el: Use lexical-binding.
(rmail-output-read-file-name): Remove unused var `err`.
(rmail-convert-to-babyl-format): Remove unused var `count`.
(rmail-output-as-mbox): Remove unused vars `from` and `date`.

* lisp/mail/rmailsort.el: Use lexical-binding.
(rmail-sort-messages): Remove unused var `msginfo`.

* lisp/mail/rfc822.el: Use lexical-binding.
* lisp/mail/rmailedit.el: Use lexical-binding.
* lisp/mail/mailclient.el: Use lexical-binding.
* lisp/mail/blessmail.el: Use lexical-binding.
* lisp/mail/mail-hist.el: Use lexical-binding.
* lisp/mail/rmailkwd.el: Use lexical-binding.
* lisp/mail/rmailmsc.el: Use lexical-binding.
* lisp/mail/uce.el: Use lexical-binding.
* lisp/mail/unrmail.el: Use lexical-binding.

Update docstrings of 'delete'/'remove' to interlink each other (bug#47054)

* lisp/subr.el (remove): Add xref to 'delete'.
* src/fns.c (Fdelete): Add xref to 'remove'.

* lisp/tab-bar.el (tab-bar--current-tab-find): New function.

(tab-bar-close-other-tabs, tab-bar-close-group-tabs): Use it.
(tab-bar--history-pre-change): Rename from
'tab-bar-history--pre-change' to follow naming convention.
(tab-bar-history-mode): Use renamed 'tab-bar--history-pre-change'.

On MS-Windows, fflush stderr after newline

Problem reported by Ioannis Kappas (Bug#46388).
* src/sysdep.c (errputc) [WINDOWSNT]: Flush stderr after newline.

* lisp/outline.el (outline-font-lock-keywords): Simplify

The `laxmatch` part of `font-lock-keywords` is just a boolean.

* lisp: Remove yet more always-nil variables

* lisp/align.el (align-region):
Remove always-nil variable `group-c`.
* lisp/ido.el (ido-make-prompt): Remove always-nil variable `prefix`.

* lisp/xdg.el (xdg-mime-collect-associations):
Remove always-nil variable `end`.

* lisp/calc/calc-yank.el (calc-edit):
Remove always-nil variable `flag`.

* lisp/calendar/todo-mode.el (todo-edit-item--header):
Remove always-nil variable `dayname`.
(todo-show-categories-table):
Remove always-nil variable `sortkey`.

* lisp/emacs-lisp/checkdoc.el (checkdoc-ispell-docstring-engine):
Remove always-nil variable `err`.

* lisp/emacs-lisp/tcover-ses.el: Remove always-nil variable `pause`.

* lisp/eshell/em-ls.el (eshell-ls-files):
Remove always-nil variable `ignore`.

* lisp/net/ange-ftp.el (ange-ftp-copy-file-internal): Remove always-nil
variable `temp2`.

* lisp/progmodes/cperl-mode.el (cperl-tags-hier-init): Remove
always-nil variables `l1`, `l2`, `l3`.
(cperl-tags-treeify): Remove always-nil variable `l1`.

* lisp/progmodes/ebrowse.el (ebrowse-tags-read-member+class-name):
Remove always-nil variable `class`.

* lisp/textmodes/artist.el (artist-draw-ellipse-with-0-height):
Remove always-nil variable `fill-info`.

* lisp/textmodes/flyspell.el (flyspell-emacs-popup):
Remove always-nil variable `show-affix-info`.

* lisp/textmodes/rst.el (rst-Ado):
Remove always-nil variable `char`.

* lisp/vc/vc.el (vc-diff-build-argument-list-internal):
Remove always-nil variable `rev2-default`.

* lisp/cedet: Remove always-nil variables

* lisp/cedet/ede/pmake.el (ede-proj-makefile-insert-variables):
Remove always-nil variable `conf-done`.

* lisp/cedet/ede/project-am.el: Use ref instead of dynbound var.
(project-rescan): Pass the ref.
(project-am-expand-subdirlist): Use it.

* lisp/cedet/semantic/idle.el (semantic-idle-work-core-handler):
Fix misuse of the wrong `errbuf `variable.

* lisp/cedet/semantic/scope.el (semantic-analyze-scoped-type-parts):
Remove always-nil variable `extmeth`.

* lisp/cedet/semantic/wisent/comp.el (wisent-context-name)
(wisent-context-bindings): Make them into functions.
(wisent-with-context): Use `dlet`.

* lisp/emulation/edt.el (edt-with-position): Don't bind `left`

(edt-find-forward, edt-find-next-forward, edt-sentence-forward)
(edt-paragraph-forward): Adjust accordingly.

* lisp/vc/pcvs-parse.el: Fix lexical-binding breakage

(cvs-parse-table, cvs-parse-merge, cvs-parse-status, cvs-parse-commit):
Declare vars set by `cvs-match` as dynamic.

* lisp/ses.el (ses-set-cell): Use `macroexp-let2`

(ses--\,@); Rename from `ses--metaprogramming`.

* lisp/obsolete/iswitchb.el: Remove dead code

(most-len, most-is-exact): Delete vars.
(iswitchb-output-completion): Delete function.
(iswitchb-completions): Delete dead code consequence of `most` being nil.

* lisp/org/: Delete some always-nil variables

* lisp/org/ob-lilypond.el (org-babel-lilypond-compile-lilyfile):
Remove always-nil variable `arg-2`.

* lisp/org/ol-gnus.el (org-gnus-store-link):
Remove always-nil variables `newsgroup` and `xarchive`.

* lisp/org/ol.el (org-store-link):
Remove always-nil variable `description`.

* lisp/org/org-clock.el (org-clock-special-range):
Remove always-nil variables `m1` and `m`.

* lisp/org/org-crypt.el (org--matcher-tags-todo-only): Declare var.

* lisp/org/org-protocol.el (org-protocol-open-source):
Remove always-nil variable `result`.

* lisp/org/ox-odt.el (org-odt-format-label):
Remove always-nil variable `short-caption`.
(org-odt-link--inline-formula):
Remove always-nil variables `width` and `height`.

* lisp/org/ox.el (org-export--missing-definitions):
Remove always-nil variable `seen`.

* lisp/emacs-lisp/cconv.el (cconv--analyze-use): Warn never-initialized vars

(byte-compile-not-lexical-var-p): Remove Emacs<24 compatibility.

Re-fix previous Info-fontify-node change

* lisp/info.el (Info-fontify-node): Re-fix previous fix here
(bug#34661) by fixing an off-by-one error in the `looking-back'.

* lisp/mouse.el: Fix mouse-1-clock-follows-mouse = double

This functionality was broken by commit 3d5e31eceb9dc1fb62b2b2,
the problem being that we end up considering as distinct the events
`down-double-mouse-1` and `double-down-mouse-1`.

Reported by Eyal Soha <eyalsoha@gmail.com>

(mouse--click-1-maybe-follows-link): Make sure the last element of
the list passed to `event-convert-list` is indeed a "basic" event.

Add remote processes to Tramp sshfs method

* doc/misc/tramp.texi (FUSE setup): Method sshfs supports also
remote processes.

* lisp/net/tramp-cache.el (tramp-get-file-property)
(tramp-set-file-property): Move setting of
`tramp-cache-unload-hook' out of function.

* lisp/net/tramp.el (tramp-expand-args): New defun.
(tramp-handle-make-process):
* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-out-of-band)
(tramp-maybe-open-connection):
* lisp/net/tramp-sshfs.el (tramp-sshfs-maybe-open-connection):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-send-command): Use it.

* lisp/net/tramp-sshfs.el (tramp-methods) <sshfs>:
Adapt `tramp-mount-args'.  Add `tramp-login-args',
`tramp-direct-async', `tramp-remote-shell',
`tramp-remote-shell-login' and `tramp-remote-shell-args'.
(tramp-connection-properties): Set "direct-async-process" fir sshfs.
(tramp-sshfs-file-name-handler-alist): Add `exec-path',
`make-process', `process-file', `set-file-modes', `shell-command',
`start-file-process', `tramp-get-remote-gid',
`tramp-get-remote-uid' and `tramp-set-file-uid-gid'.
(tramp-sshfs-handle-exec-path, tramp-sshfs-handle-process-file)
(tramp-sshfs-handle-set-file-modes): New defuns.

* test/lisp/net/tramp-tests.el (tramp-test20-file-modes)
(tramp-test28-process-file, tramp-test29-start-file-process)
(tramp-test30-make-process, tramp-test32-shell-command)
(tramp-test32-shell-command-dont-erase-buffer)
(tramp-test34-explicit-shell-file-name, tramp-test35-exec-path)
(tramp-test43-asynchronous-requests): Run also for tramp-sshfs.
(tramp--test-shell-file-name): New defun.
(tramp-test28-process-file)
(tramp-test34-explicit-shell-file-name)
(tramp-test43-asynchronous-requests): Use it.
(tramp-test40-special-characters-with-stat)
(tramp-test40-special-characters-with-perl)
(tramp-test40-special-characters-with-ls)
(tramp-test41-utf8-with-stat, tramp-test41-utf8-with-perl)
(tramp-test41-utf8-with-ls): Remove superfluous skip.

Make tags tables from Texinfo sources

* doc/misc/Makefile.in (ETAGS, texifiles): New variables.
(TAGS, tags, FORCE, ${ETAGS}): New targets.
(bootstrap-clean maintainer-clean): Delete TAGS.
* doc/lispref/Makefile.in (ETAGS, texifiles): New variables.
(TAGS, tags, FORCE, ${ETAGS}): New targets.
(bootstrap-clean maintainer-clean): Delete TAGS.
* doc/lispintro/Makefile.in (ETAGS, texifiles): New variables.
(TAGS, tags, FORCE, ${ETAGS}): New targets.
(bootstrap-clean maintainer-clean): Delete TAGS.
* doc/emacs/Makefile.in (ETAGS, texifiles): New variables.
(TAGS, tags, FORCE, ${ETAGS}): New targets.
(bootstrap-clean maintainer-clean): Delete TAGS.
* Makefile.in (TAGS tags): Make tags in doc/emacs, doc/lispintro,
doc/lispref and doc/misc.

* src/image.c (image_set_transform): Don't use ! for Lisp object.

* src/image.c (FRAME_SCALE_FACTOR): Define only when needed.

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).