Found a monospace flavor of Roboto!
.ace_editor{ font-family:'Roboto Mono', monospace!important; }
I have discovered that !important is required to force the editor to use the font, otherwise it uses one of these fonts:
- Monaco
- Menlo
- Ubuntu Mono
- Consolas
- Source Code Pro
Thanks for the help everyone. It looks like the editor only plays nice with monospaced fonts. Dur.