> I agree that CodeMirrors general infrastructure for folding is more powerful than ACE's. But CodeMirror still lacks fold buttons on the gutter. The folding u

> I agree that CodeMirrors general infrastructure for folding is more powerful than ACE's. But CodeMirror still lacks fold buttons on the gutter. The folding utility in the distribution does lack them. But adding them (as in the 2.x code folder) is, again, just a few lines of code -- there's support for showing gutter widgets in the core, and the only reason the folding utility doesn't use that that I felt they didn't add much.