Broken syntax highlighting after the first submodule

[hwayne]

---- MODULE foo ----
---- MODULE bar ----

Op1 == TRUE
====

Op2 == TRUE
====

Highlighting will not cover Op2.

[lemmy]

The second module header nested within doesn't even get highlighted accurately. I assume that it has never been correctly highlighted. AFAIK syntax highlighting is based on regex and I imagine this case will be difficult to handle.