bug#40919: 27.0.91; next-error-select-buffer does not always behave as documented

[Eli Zaretskii]

> Cc: 40919@debbugs.gnu.org, tspiteri@ieee.org, juri@linkov.net
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Tue, 26 May 2020 19:20:50 +0300
> 
> > Maybe I don't understand something, but it looks to me that this
> > changes the behavior if next-error-find-buffer-function has a
> > non-default value:
> 
> Yes. I only claimed that the _default_ behavior doesn't change. The user 
> option was only added in Emacs 27, so this doesn't seem to be a big problem.

OK.