Before this change, ? Array.try_convert would highlight the code
snippets as C, but because it's actually a ruby method all the code in
the comment is ruby.
Before this change all `` pairs were removed from documentation which
makes the ``foo'' quoting style used by some authors look very odd.
We'd also try to syntax highlight code inside `` inside code, which
caused nasty rendering errors as the escape sequences got tangled up.
