* test/lisp/vc/log-edit-tests.el (log-edit-fill-entry-confinement)
(log-edit-fill-entry-space-substitution)
(log-edit-fill-entry-initial-wrapping): Replace literal space character
with '\s', to avoid tripping up merge scripts.

* 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.

Reported by john muhl <jm@pub.pink>.

* test/lisp/vc/vc-git-tests.el (vc-git-test--with-repo): Set
some environment variables (lifted from vc-tests.el) to let
'git commit' compute dummy author and committer identities.

This re-applies:

  2024-03-17 "Fix vc-dir when "remote" Git branch is local"
  (21828f288ef)

reverted as part of the unrelated:

  2024-03-17 "Update modus-themes to their 4.4.0 version"
  (67b0c1c09ea)

The original commit message follows:

Fix vc-dir when "remote" Git branch is local

While in there, add that "tracking" branch to the vc-dir
buffer.  For bug#68183.

* lisp/vc/vc-git.el (vc-git-dir-extra-headers): Reduce
boilerplate with new function 'vc-git--out-ok'; stop calling
vc-git-repository-url when REMOTE is "." to avoid throwing an
error; display tracking branch; prefer "none (<details...>)" to
"not (<details...>)" since that reads more grammatically
correct.
(vc-git--out-ok): Add documentation.
(vc-git--out-str): New function to easily get the output from a
Git command.
* test/lisp/vc/vc-git-tests.el (vc-git-test--with-repo)
(vc-git-test--run): New helpers, defined to steer clear of
vc-git-- internal functions.
(vc-git-test-dir-track-local-branch): Check that vc-dir does
not crash.

* doc/misc/modus-themes.org: Update the manual to better document
existing functionality and cover the new features.

* etc/themes/modus-operandi-deuteranopia-theme.el:
* etc/themes/modus-operandi-theme.el:
* etc/themes/modus-operandi-tinted-theme.el:
* etc/themes/modus-operandi-tritanopia-theme.el:
* etc/themes/modus-vivendi-deuteranopia-theme.el:
* etc/themes/modus-vivendi-theme.el:
* etc/themes/modus-vivendi-tinted-theme.el:
* etc/themes/modus-vivendi-tritanopia-theme.el: Update the
palette of each theme.

* etc/themes/modus-themes.el (require): Remove call to cl-lib
and do not use relevant functions.
(modus-themes-operandi-colors, modus-themes-vivendi-colors)
(modus-themes-version, modus-themes-report-bug): Remove old
calls to 'make-obsolete' and related.

(modus-themes--annotate-theme): Tweak the completion annotation function.

(modus-themes--org-block): Deprecate the user option 'modus-themes-org-blocks'.
(modus-themes-faces): Update faces.
(modus-themes-custom-variables): Update the list of custom
variables.

Detailed release notes are available here:
<https://protesilaos.com/codelog/2024-03-17-modus-themes-4-4-0/>.

While in there, add that "tracking" branch to the vc-dir
buffer.  For bug#68183.

* lisp/vc/vc-git.el (vc-git-dir-extra-headers): Reduce
boilerplate with new function 'vc-git--out-ok'; stop calling
vc-git-repository-url when REMOTE is "." to avoid throwing an
error; display tracking branch; prefer "none (<details...>)" to
"not (<details...>)" since that reads more grammatically
correct.
(vc-git--out-ok): Add documentation.
(vc-git--out-str): New function to easily get the output from a
Git command.
* test/lisp/vc/vc-git-tests.el (vc-git-test--with-repo)
(vc-git-test--run): New helpers, defined to steer clear of
vc-git-- internal functions.
(vc-git-test-dir-track-local-branch): Check that vc-dir does
not crash.

* lisp/vc/log-edit.el (log-edit--insert-filled-defuns): Don't
open a new line for long defuns at column 0.

* test/lisp/vc/log-edit-tests.el
(log-edit-fill-entry-space-substitution): Adjust expected
results to match change.
(log-edit-fill-entry-initial-wrapping): New test.

* lisp/vc/log-edit.el (log-edit-fill-entry): Replace space
characters within defun lists with NBSPs for the duration of
`fill-region''s execution, so that they are never considered
break points.

* test/lisp/vc/log-edit-tests.el
(log-edit-fill-entry-space-substitution): New test.