Syntax: Comments
Comments begin with //-.
//- This is a comment
You may nest under it, and those lines will be ignored.
//- everything here is ignored:
a(href="/")
| Link
-# is also supported to keep consistency with Elixir.
-# This is also a comment
HTML comments
HTML comments begin with // (no hyphen). They will be rendered as <!-- ... -->.
// This is a comment