tpope/vim-haml — pull request #30 by mattsa (2012-01-02 20:07:47+00:00)
Title: Add interpolation for pseudo elements

Example:

```sass
@for $i from 1 through 7
li.menu:nth-child(#{$i})
+animation-delay(0.44s + (0.037s * $i))
```

Should now highlight SASS interpolation inside cssPseudoClass