atom/language-gfm — pull request #53 by dougborg (2014-10-21 03:18:55+00:00)
Title: Correct tokenization of id-less reference links.

- This is an acceptable style of id-less (or implicit-id'd) reference
links:

```gfm
[This][] is an acceptable way to define reference links. The
reference list "id" is the inferred from the link text.

[This]: http://daringfireball.net/projects/markdown/syntax#link
```

- Added and renamed tests to better describe behavior.