Syntax highlighting wrong in listish type signature or top-level pattern matching.

Hello.

When writing something like:

``` haskell
bleh, bluh ∷ Blah
[bleh,bluh] = map blahfication [e,u]

blih :: Blah
```

bleh and bluh appeir in normal font-face in haskell mode, while one would expect them to appeair highlighted like blih is. The "comma-separated multiple type signature" case should definetely be highlighted. I admit that the "pattern matching at top-level" is more tricky…
