Properly handle multi-line comments

[yurrriq]

Broken implementation:

(,(rx (group "{-") (group (* anything)) (group "-}"))
 (1 font-lock-comment-delimiter-face)
 (2 font-lock-comment-face)
 (3 font-lock-comment-delimiter-face))

[tjweir]

Given the similarity to Haskell comments, I think we should be able to learn from their handling of {- ... -}

[yurrriq]

Yeah, I glanced at it and it looks like they use syntax tables. I think we'll need to dig into them for indentation handling too.

[tjweir]

Yes, I started looking into syntax tables for this, I don't know much right now.

[yurrriq]

Same...