* doc/misc/tramp.texi (Inline methods): Add "surs" and "sudors" methods.

* etc/NEWS: Add optional "surs" and "sudors" Tramp methods.
Presentational fixes and improvements.

* lisp/net/tramp-cmds.el (tramp-file-name-with-method): Add "surs"
and "sudors" to :type.  Adapt :version.

* lisp/net/tramp-sh.el (tramp-enable-surs-method)
(tramp-enable-sudors-method): New defuns
(tramp-sh-handle-expand-file-name): Add "surs" and "sudors" in check.

* lisp/net/tramp.el (tramp-methods): Adapt docstring.

* lisp/comint.el (comint-password-prompt-regexp):
* test/lisp/comint-tests.el (comint-testsuite-password-strings):
Add su-rs and sudo-rs password prompts.

* doc/emacs/display.texi (Semantic Font Lock): New node.
* doc/emacs/emacs.texi: Update menu.
* etc/NEWS: Update relevant entry.
* lisp/emacs-lisp/elisp-scope.el: Expand commentary.
* doc/misc/elisp-semantic-highlighting.org: Delete it.

* lisp/keymap.el (defvar-keymap): New ':prefix t' abbreviation.
* lisp/emacs-lisp/helper.el (Helper-help-map):
* lisp/vc/pcvs.el (cvs-mode-diff-map):
* lisp/vc/vc-hooks.el (vc-prefix-map):
* lisp/vcursor.el (vcursor-map): Use it.
* doc/lispref/keymaps.texi (Creating Keymaps):
* etc/NEWS: Document it.

The buffer-local-versions of 'window-buffer-change-functions',
'window-size-change-functions',
'window-selection-change-functions' and
'window-state-change-functions' are now run with the respective
buffer temporarily current.  Also, the local version of
'window-buffer-change-functions' is run for the buffer removed
from the window too.

* src/window.c (run_window_change_functions_locally)
(run_window_change_functions_globally): New functions replacing
'run_window_change_functions_1'.
(run_window_change_functions): Run the buffer local versions of
these hooks in their respective buffers.  Run
'window-buffer-change-functions' for the buffer removed from the
window too.
(Vwindow_buffer_change_functions, Vwindow_size_change_functions)
(Vwindow_selection_change_functions)
(Vwindow_state_change_functions): Mention that the buffer-local
versions are run with their buffer temporarily current.
* doc/lispref/windows.texi (Window Hooks): Mention that
buffer-local-versions of window change functions are run with
their buffer temporarily current.  Also say that
'window-buffer-change-functions' will be run for removed buffer
too.
* etc/NEWS: Advertise changes for the buffer-local versions of
window change functions.

* etc/NEWS: Describe effect of auth-sources being nil.

* lisp/auth-source.el (auth-sources): Add const nil.
(auth-source-ignored-keys): New defconst.
(auth-source-backends, auth-source-keys)
(auth-source-search-keys, auth-source-returned-keys)
(auth-source-search-spec): New macros.
(auth-source-file-name-p, auth-source-search)
(auth-source-specmatchp, auth-source-netrc-create)
(auth-source-secrets-search, auth-source-secrets-create)
(auth-source-macos-keychain-search)
(auth-source-plstore-search, auth-source-plstore-create): Use them
(auth-source-read-passwd-search, auth-source-read-passwd-create):
New defuns.

* test/lisp/auth-source-tests.el
(auth-source-backend-parse-plstore-string)
(auth-source-backend-parse-json-string)
(auth-source-backend-parse-fallback)
(auth-source-test-read-passwd-create-secret): New tests.

* lisp/vc/diff-mode.el (diff-buffer-file-names): New function.
* lisp/vc/log-view.el (vc--pick-or-revert)
(vc--prompt-other-working-tree): Autoload.
(vc-parent-buffer-name, vc-log-short-style)
(vc-print-log-internal): Declare.
(log-view--pick-or-revert): New function.
(log-view-revision-cherry-pick, log-view-revision-revert): New
commands.
(log-view-mode-map, log-view-mode-menu): Bind them.
* lisp/vc/vc-dispatcher.el (vc-start-logentry): If
get-file-buffer returns nil, use the current buffer as the
parent buffer.
* lisp/vc/vc.el (diff-buffer-file-names, diff-reverse-direction):
Declare.
(vc--pick-or-revert): New function.
(vc-revision-cherry-pick, vc-revision-revert): New commands.
* lisp/vc/vc-hooks.el (vc-menu-map): Bind them.
* doc/emacs/maintaining.texi (VC Change Log, VC Undo)
(Copying Between Branches):
* etc/NEWS: Document the new commands.

* lisp/vc/log-view.el (log-view-copy-revision-as-kill):
* doc/emacs/maintaining.texi (VC Change Log):
* etc/NEWS: Improve wording of last commit.  (Bug#79493)