Future proof loading of Gem::DocManager
Future proof loading of Gem::DocManager

Fixes #627

ohai/yard,ohai/yard,lsegal/yard,thomthom/yard,iankronquist/yard,alexdowad/yard,lsegal/yard,iankronquist/yard,jreinert/yard,ohai/yard,alexdowad/yard,herosky/yard,amclain/yard,jreinert/yard,herosky/yard,jreinert/yard,herosky/yard,thomthom/yard,alexdowad/yard,iankronquist/yard,lsegal/yard,thomthom/yard,amclain/yard,amclain/yard