GitLab

* doc/lispref/abbrevs.texi (Abbrev Files, Abbrev Expansion):
* doc/emacs/abbrevs.texi (Dabbrev Customization): State the
default values of variables.  Suggested by Steve Byrne
<sbb@penguinis.org>.  (Bug#23016)

* admin/release-process (Check manuals): Mark files reviewed by
Steve Byrne.