bug#63949: 30.0.50; `vc-print-log´ does not erase buffer when called from *vc-change-log* buffer, at least for CVS logs

[Eli Zaretskii]

> Date: Fri, 9 Jun 2023 22:27:37 +0200
> Cc: manuel@ledu-giraud.fr, 63949@debbugs.gnu.org
> From: Jens Schmidt <jschmidt4gnu@vodafonemail.de>
> 
> emacs -Q (from emacs-29)
> <visit git-controlled file, say README>
> 
> ;; current buffer equals README
> C-x v l
> ;; current buffer equals *vc-change-log*
> C-h v vc-parent-buffer
> => #<buffer README>
> 
> ;; current buffer equals *vc-change-log*
> C-x v l
> C-h v vc-parent-buffer
> => #<buffer *vc-change-log*>
> 
> ;; current buffer equals *vc-change-log*
> C-x v l
> ;; git log of whole repository is displayed, not of README

Thanks for the explanations.

> Not all VC commands expose this problem.

Why do you think it's a problem?  I can justify this behavior, at
least in some use cases.