bug#44611: Prefix arg for xref-goto-xref

[Eli Zaretskii]

> Cc: juri@linkov.net, joaotavora@gmail.com, 44611@debbugs.gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Fri, 25 Dec 2020 16:49:39 +0200
> 
> >> Changing the latter to use the xref UI (which will have to be renamed
> >> and become a separate package, BTW) is also likely to encounter much
> >> bigger resistance than anything we've done in this area before: people
> >> don't have the same expectations for new commands as they have for
> >> existing ones, so I'm surprised you asked this (given your overall
> >> backward compatibility stance, much stronger than mine).
> > 
> > An optional feature cannot hurt, even if and when it becomes the
> > default.  Thus, there's no need for me to object to such long-term
> > plans, if they are announced and proceed at a controlled pace
> > (including the decision when it becomes the default).
> 
> This endeavor might need more of an encouragement than "I don't object".

I didn't have encouragement in mind.  I'm asking if this is the plan,
or some kind of desire.  If it is, then I can understand that.  If
there's no such plan, then I don't think I understand why we need to
make Xref behave similarly and have the same key bindings.