Fix Syntax Highlighting issues

[IvanMathy]

Known issues:

• < gets picked up as the start of an XML tag if there is a >somewhere else in the doc, even when it should not be.

Feel free to comment with more issues

[0xfffffff0075e2040]

So you mean the syntax highlighting is broken, because it interprets < (stuff here) > as a xml tag, without checking if it is an xml tag?