@mattr- We'd be able to do that in the Configuration class, no problem at all.

I'm a proponent of a `highlighter` property, allowing only the values `nil` (off), `pygments` or `rouge`. We'd have to figure out how to manage the gem dependency (include both? include just pygments.rb? include neither?) and how we'd want the options to collapse (i.e. `pygments: true` turns into `highlighter: pygments` and we print a deprecation message).

/cc @benbalter