bug#43431: superfluous bury-buffer needed due to earlier gnus-summary-select-article-buffer

[積丹尼 Dan Jacobson]

When using C-d [gnus-summary-enter-digest-group] why does one need three
q's instead of two, to return to the (Highest, not just that of the
digest) *Summary* buffer?

 C-d [gnus-summary-enter-digest-group]
 <return> [gnus-summary-scroll-up]
 h [gnus-summary-select-article-buffer]
 q [gnus-summary-expand-window]
 q [gnus-summary-exit]
 q [bury-buffer]

You know, between q number 2 and q number 3, what is on the screen does
not change at all, giving the impression that emacs is dumb.

Same here, three q's:

 C-d [gnus-summary-enter-digest-group]
 SPC [gnus-summary-next-page]
 n [gnus-summary-next-unread-article]
 h [gnus-summary-select-article-buffer]
 n [gnus-article-read-summary-keys]
 n n [gnus-article-read-summary-keys]
 n q [gnus-summary-expand-window]
 q [gnus-summary-exit]
 q [bury-buffer]

Ah. we see it is all related to that critical "h". If we never used the
"h", we would never encounter the problem:

 C-d [gnus-summary-enter-digest-group]
 SPC [gnus-summary-next-page]
 n [gnus-summary-next-unread-article]
 n [gnus-summary-next-unread-article]
 n [gnus-summary-next-unread-article]
 q [gnus-summary-exit]

Wow, only one q to get back to the (Highest, not just that of the
digest) *Summary* buffer.

Anyway, for the h cases, please make it use two q's instead of three.
Thanks.

P.S., it may be due to my
https://www.jidanni.org/comp/configuration/.emacs
https://www.jidanni.org/comp/configuration/.gnus.el

Gnus v5.13
GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20)
 of 2020-05-17, modified by Debian