visionmedia/jade — pull request #617 by chowey (2012-04-29 19:47:56+00:00)
Title: Initial support for mixin attributes

Mixins act like tags:

```jade
+foo#id.class(href='#')
+foo.bar(class='baz')
+foo('arg1', 'arg2')(class='quux')= title
```

all work. This is because after stripping the mixin call and arguments, we parse the rest just like a tag.