bug#64055: [WIP Patch] Enable editing commit messages - vc-git-modify-change-comment

[Eli Zaretskii <eliz@gnu.org>]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Cc: 64055@debbugs.gnu.org,  Morgan.J.Smith@outlook.com,  rpluim@gmail.com,
>   dmitry@gutov.dev
> Date: Sun, 20 Oct 2024 15:18:38 +0800
> 
> Hello,
> 
> On Sun 20 Oct 2024 at 09:09am +03, Eli Zaretskii wrote:
> 
> > I see vc-hg-log-switches and vc-bzr-log-switches, so I don't think I
> > understand why you say Git is special here.  What did I miss?
> 
> By "older VCS" I did not mean to include Hg and bzr, which are special
> in the same way as Git.  And indeed, neither vc-bzr or vc-hg have
> log-view-modify-change-comment support.  It would be good to add it.

I consider this change incomplete until we add that support at least
for Hg.

> > In any case, the reason for having a backend method should be
> > explained in the comments.
> 
> I've added a FIXME pointing to this bug.  Is there somewhere else you
> have in mind?

I don't see it; did you forget to push?  In any case, I prefer an
explicit explanation, including the reference to the vc-*-log-switches
variables, not just a reference to a bug number.

Thanks.