rbbr is written in ruby-gtk2 and depends on the ruby-gnome2-0.7.0 package that needs to be bumped first. It also introduces a new local use flag 'ri' for dev-ruby/ri. With ri installed rbbr will not only show the ruby-gnome2 api, but also the standard ruby libs and builtins.
Created attachment 18946 [details] rbbr-0.4.0.ebuild
Seems to me that depending on ri isn't very heavy after we're already depending on the ruby-gnome2 stuff, so I pulled out the local USE flag. Hope you don't mind; let me know if you think that's a really bad idea. Otherwise I also changed the tabbing since the Gentoo standard for ebuilds is 1 tab per indent. Spaces aren't supposed to be used for indenting (even though it sometimes looks better). Thanks for the ebuild. It's in cvs now.