* lisp/vc/diff-mode.el (diff--get-revision-properties):
Never pass FILE to 'diff-syntax-fontify-props'; assume that
'vc-find-revision-no-save' has called the major mode function
already (bug#71604).

bf50aa38f9d Improve documentation of case-conversion commands
225b426f256 ; Fix typos

* lisp/vc/vc.el: Add autoloaded setting of 'safe-local-variable' property
for 'vc-default-patch-addressee' exactly like it's already done
for 'vc-prepare-patches-separately'.

* lisp/vc/vc-git.el (vc-git-root-log-format): Explicity match
periods, rather than matching them only because '.' matches any
chars.

* lisp/vc/log-edit.el (log-edit-fill-entry): Match and replace
with NBSPs the opening defun list also.

* test/lisp/vc/log-edit-tests.el
(log-edit-fill-entry-no-defun-list-wrapping): New test.

This new package provides an API that is easier to use right than
our `*-change-functions` hooks.

The patch includes changes to `diff-mode.el` and `eglot.el` to
make use of this new package.

* lisp/emacs-lisp/track-changes.el: New file.
* test/lisp/emacs-lisp/track-changes-tests.el: New file.
* doc/lispref/text.texi (Tracking changes): New subsection.

* lisp/progmodes/eglot.el: Require `track-changes`.
(eglot--virtual-pos-to-lsp-position): New function.
(eglot--track-changes): New var.
(eglot--managed-mode): Use `track-changes-register` i.s.o
`after/before-change-functions` when available.
(eglot--track-changes-signal): New function, partly extracted from
`eglot--after-change`.
(eglot--after-change): Use it.
(eglot--track-changes-fetch): New function.
(eglot--signal-textDocument/didChange): Use it.

* lisp/vc/diff-mode.el: Require `track-changes`.
Also require `easy-mmode` before the `eval-when-compile`s.
(diff-unhandled-changes): Delete variable.
(diff-after-change-function): Delete function.
(diff--track-changes-function): Rename from `diff-post-command-hook`
and adjust to new calling convention.
(diff--track-changes): New variable.
(diff--track-changes-signal): New function.
(diff-mode, diff-minor-mode): Use it with `track-changes-register`.

* lisp/vc/ediff-ptch.el (ediff-patch-file-internal): Quote file
names that can include special characters.  (Bug#70329)

* lisp/vc/vc-hooks.el (vc-registered, vc-backend): Return nil
without invoking any backend if FILE or FILE-OR-LIST sits within
/content or /assets.