gtk-demo: Use textwrap to reformat description for Gtk.TextView
gtk-demo: Use textwrap to reformat description for Gtk.TextView

https://bugzilla.gnome.org/show_bug.cgi?id=698547

sfeltman/pygobject,GNOME/pygobject,GNOME/pygobject,pexip/pygobject,sfeltman/pygobject,GNOME/pygobject,pexip/pygobject,davibe/pygobject,davibe/pygobject,davibe/pygobject,davibe/pygobject,pexip/pygobject,sfeltman/pygobject