bug#31796: 27.1; dired-do-find-regexp-and-replace fails to find multiline regexps

[Eli Zaretskii]

> Cc: abela@chalmers.se, 31796@debbugs.gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Tue, 24 Nov 2020 21:43:22 +0200
> 
> How about https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31796#23 ?

The idea sounds fine to me.

> Someone more familiar with existing ports of Grep on different systems 
> should weigh in on it.

I don't think it's necessary.  We just need to probe Grep for support
of these switches, and then use it.  The result cannot be worse than
it is now.

> >> If you're saying we can't afford to break even a minor feature like
> >> this, I don't think there are a lot of options.
> > 
> > We should try not to break any features, yes.
> 
> That's just common sense.

Of course.