Bug#953911: debian-policy: clarify documentation of "Closes: #NNNNNN" changelog syntax

[Guillem Jover <guillem@debian.org>]

Hi!

On Sun, 2022-09-18 at 21:42:37 -0700, Russ Allbery wrote:
> "Daniel Shahaf" <danielsh@apache.org> writes:
> > Here's a revision of the patch incorporating the feedback so far:
> 
> Thank you for this patch!  I confirmed that your description matches the
> regular expression.  This has now been applied for the next release of
> Debian Policy.

I also committed a changed based off this patch to dpkg's
deb-changelog(5) man page, which I mentioned some time ago I'd do,
but probably didn't as I thought the patch here still had the issue
discussed at the time.

Thanks,
Guillem