This was too much trouble, however I have migrated our previous code syntax highlighting solution from google-code-prettify to highlight.js, in order to get better language support.
Currently the auto detection for code blocks posted without language specifier in first line is poor to say the least.
I can improve it by restricting the language implementations using the configure method of highlight.js but I haven't done so yet, because I don't have a list of desired languages to restrict it to. Suggestions welcome.
Also light.css is just the highlight.js default.css and dark.css is just higlight.js dark.css, so if people want different stylesheets, find one you like from https://github.com/isagalaev/highlight.js/tree/master/src/styles
and suggest it.
The changes haven't been committed to the git repository yet, but that will happen shortly.