[PATCH v4 16/16] md2html: change css name to not conflict with highlight

[Jason A. Donenfeld]

Hi Andy,

This seems like an obvious thing to merge, but I'm actually not so
certain I understand its necessity. md2html uses the highlight class.
Our css uses the highlight class. You're saying this conflicts with
something? From where? Third-party CSS? If that's the case, and if
it's a serious problem to recon with, do we then want to just
namespace all of our classes as .cgit subclasses, or as
.cgit-highlight, .cgit-whatever prefixes?

Jason