That'd be neat. I couldn't find one using google though. Anyone heard or seen something for Pluma or wanna make a plugin?
(Pluma is the text editor for Mate Desktop. Mate Desktop is a fork of Gnome 2, so Pluma is a fork of Gnome 2's Gedit).
That answer is no, not yet. I couldn't find one. Perhaps one day someone will create such a plugin.