pidgin/pidgin

Clean up some random gtk-doc warnings in libpurple's documentation

Testing Done:
Ran `ninja libpurple-doc` locally, verified the warnings went away.

Reviewed at https://reviews.imfreedom.org/r/585/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$