bug#65763: Error opening a file from a Git working directory if Git is not installed

[Eli Zaretskii]

> From: Paul Pogonyshev <pogonyshev@gmail.com>
> Date: Sun, 10 Sep 2023 19:36:47 +0200
> Cc: Dmitry Gutov <dmitry@gutov.dev>, monnier@iro.umontreal.ca, 
> 65763@debbugs.gnu.org
> 
> -       ((setq backend (with-demoted-errors "VC refresh error: %S"
> -                        (vc-backend buffer-file-name)))
> +       ((setq backend (let (debug-on-error)
> +                        (with-demoted-errors "VC refresh error: %S"
> +                          (vc-backend buffer-file-name))))
> 
> From my experience, you should always comment such things. Or add an 
> automated test ensuring it.
> Or even better, do both. It is extremely non-obvious why this is needed at 
> all and someone can easily
> undo your changes a few years later.

Yes, if this (or anything like it) goes in, we will comment it.  We
just haven't yet decided whether this will be the solution.