Multiline schema descriptions break syntax highlighting

[Stowe4077]

While #41 seemed to fix inline descriptions, the syntax highlighting does not appear to work when multi-line descriptions are in use.
In this example, the type description, the attribute name are flagged red, and contextual help/auto complete does not function:

Compared to the same with # style comments or single line """ descriptions where just the description text is red (but contextual help/auto complete does work):