bug#55778: 29.0.50; [PATCH] M-. into a .gz; we've all been there.

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: dick.r.chiang@gmail.com,  55778@debbugs.gnu.org,  monnier@iro.umontreal.ca
> Date: Mon, 06 Jun 2022 14:25:34 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > That it supports C files doesn't mean it cannot support others: the
> > feature is quite general, not tied to C mode in any way.
> 
> It just seems like a really awkward fit -- the features aren't
> dissimilar in concept, but they're very different in feeling.
> `ff-get-other-file' tries to magically guess at stuff, while
> `find-sibling-file' explicitly leaves it all to the user.

Maybe I'm missing something, but isn't ff-other-file-alist equivalent
to your find-sibling-rules?