gplugin/gplugin

Add a doc check unit test to gplugin-gtk and fix the issues it found

7 weeks ago, Gary Kramlich
f9fd009d9ca4
Add a doc check unit test to gplugin-gtk and fix the issues it found

Testing Done:
Ran the unit tests

Reviewed at https://reviews.imfreedom.org/r/3040/
EionRobb <> EionRobb <eion@robbmob.com>
ivanhoe <107501-ivanhoe@users.noreply.gitlab.com> ivanhoe <ivanhoe@fiscari.de>
Richard Laager <rlaager@pidgin.im> <rlaager@wiktel.com>