atom/language-sass — pull request #38 by zinkkrysty (2014-12-08 16:07:38+00:00)
Title: Allow underscore character in the extend function

So this will get highlighted:

`@extend simple_card`

Note: It's my first contribution to an atom repository, so be gentle. I figured it's better to submit a pull request than to just open an issue and wait for someone to solve it. I also don't know how to test it, or if there needs to be written tests.