1.  On a system with a version of Git older than 2.7.0, navigate to a
git-controlled directory and invoke "emacs -Q".

   2.  With this as the default directory, invoke vc-dir.  This fails
with the error "vc-do-command: Failed (status 129): git --no-pager
remote get-url origin ."

   This is because the "get-url" subcommand of "git remote", used by
vc-git-repository-url, was added in 2.7.0 [1].  The attached patch
against master rev 1db7e8eba961e88181879213dd5374ad9e87ac76 uses "git
config" in a way that works in both old and new systems (tested with git
2.1.2 and git 2.35.3).

   Of course, supporting 7+-year-old versions of git is probably not a
high priority, so I won't be too disappointed if this fix is rejected.
On the other hand, it's a small change, and having vc-dir fail on any
system, especially when using Git, puts a big damper on being able to
use Emacs to hack on things in older systems, so I think it's worth
having.

					-- Bob Rogers
					   http://www.rgrjr.com/

[1]  https://github.com/git/git/blob/master/Documentation/RelNotes/2.7.0.txt,
     line 13.

------------------------------------------------------------------------
In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.16.0) of 2023-08-15 built on orion
Repository revision: 1db7e8eba961e88181879213dd5374ad9e87ac76
Repository branch: master
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