bug#56108: 29.0.50; ASAN use-after-free in re_match_2_internal

[Eli Zaretskii]

> Cc: monnier@iro.umontreal.ca, 56108@debbugs.gnu.org
> Date: Fri, 24 Jun 2022 18:40:33 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Date: Fri, 24 Jun 2022 11:35:18 +0200
> > From: Gerd Möllmann <gerd.moellmann@gmail.com>
> > Cc: 56108@debbugs.gnu.org
> > 
> > Another note:  Should some document mention that trailing whitespace are 
> > not allowed in the git repo?  I
> > couldn't find that anywhere.
> 
> I think it should be in CONTRIBUTE.  But it should describe all the
> checks done by our Git hooks in .git/hooks/, not just the
> trailing-whitespace check.
> 
> I will write that if no one beats me to it.

Now done.