syntax for comments in github's README.md?

A GitHub repo is described in a text file README.md, in Daring Fireball's Markdown format. Does that language support comments, either as a feature or a quick hack? I'd like to have some text that is visible when editing the file, but invisible in the HTML result. (Just like HTML's <!-- ... -->, or bash's # ....)

Their extensive example doesn't seem to mention this. Their mailing list archive isn't directly searchable, but even indirectly I find only vaguely related posts.


Huh. As a quick experiment I just tried <!-- ... -->, and it worked. Here's the example.