I think Rouge should be updated to support syntax highlighting for XQuery/XPath. Would be super great:
I'm engineering an evolutionary, temporal Open Source NoSQL document store, which is using XQuery for querying, so for my documentation it would be of utmost importance as I also want to release version 1.0.0 very soon :-)
Hey, they have an XQuery Syntax highlighter now, but the version used on Github Pages is too old. I have to say I moved to Netlify because it just uses the Jekyll version I specify in the Gemfile.