- New formula pygtksourceview with test (fixesHomebrew/homebrew#16410)
- Fix the pkgconfig file of pygtk, too, because the
GTK project moved the `codegen` executable from
pygtk into pygobject.
- Fix minor typo in pygtk.
FixesHomebrew/homebrew#16410.
ClosesHomebrew/homebrew#16418.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>