As of gobject-introspection 1.83.2, a new `<doc:format name="…"/>`
element is supported (as a child of `<repository>`) in GIR files.
For the moment, this information isn’t needed in libgirepository — but
the GIR parser does have to know about the element in order to not throw
an error claiming it’s invalid.
This is a slightly tweaked version of the code added to
gobject-introspection.git in commit
9544cd6c962fab2c3203898779948309833e2439 by Corentin Noël
<corentin.noel@collabora.com>, reformatted slightly to fit in with
GLib’s style guidelines.
This is backwards compatible and does not require a new
gobject-introspection version.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Fixes: #3634
aee0664e6f