2.91.2: * Fixed reference counting in completion classes and added a completion test. (Krzesimir Nowak) * Renamed gtksourceview namespace to Gsv. * Written documetation about migration from 2.0 to 3.0 - it describes most of API breaks (like the one mentioned above). (Krzesimir Nowak) * Wrapped GtkSourceGutterRenderer, GtkSourceGutterRendererPixbuf, GtkSourceGutterRendererText and GtkSourceMarkCategory. (Krzesimir Nowak) * Use the gtk conversions from gtkmm now that they are not in glibmm. That bumps mm-common requirement to yet unreleased version. (Murray Cumming)