We added some buttons to help with using Markdown while writing comments.

comments-with-buttons

Markdown is pretty easy to write by itself, but if you're unfamiliar with it the buttons can be helpful for learning. Most important is the "code" button, because indenting blocks of code the required four spaces is kind of a pain. We're looking into adding the three-backticks thing like GitHub, but this is way better than it was for now =)