bug#45581: 28.0.50; C-M-v in xref buffers shows a different buffer when scrolling

[Dmitry Gutov]

Hi!

On 01.01.2021 00:51, Daniel Martín via Bug reports for GNU Emacs, the 
Swiss army knife of text editors wrote:
> Steps to reproduce the problem:
>
> 1. emacs -Q
> 2. Open any file with source code (for example, xdisp.c).
> 3. Place the point in any symbol (for example, redisplay_internal).
> 4. Press M-? (`xref-find-references').
> 5. In the *xref* buffer, press n (`xref-next-line').
> 6. Press C-h m (`describe-mode').
> 7. Press C-M-v to scroll the help window.
>
> Expected results:
>
> The mode description window scrolls as usual.
>
> Actual results:
>
> The buffer with the file that contains the selected xref item replaces
> the *Help* buffer and is scrolled instead.
>
> I can't reproduce the same behavior in *grep* buffers.

Thanks for the report.

Xref buffers have been doing this since bug#19466, as requested by 
Martin (see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=19466#56).

Perhaps Martin or others will chime in, but otherwise you seem to be 
making a good case for not doing this anymore.