Your comments

I think I understand what you mean. Currently folding at level one will fold everything up. But what you want is for everything to be folded at the appropriate level? That is, fold every level while having every level still visible? I'd like that as well.

Sort of like a tree outline in a file browser... you want to see every level, but not stuff below folders, until you click on the triangle or plus icon to the left to unfold that node.
Gemfile is already there, at least for me, in the latest version. You can add Guardfile to your syntax-specific extensions variable.

+1 Seems users commenting here like to kill Ruby suggestions with fire.