[racket-dev] code coverage coloring

This is for a #lang-language.

Is there a reason this can't be done programatically, like other
things in the language dialog?  I understand it may not be possible in
the current release, but if there's no reason it can't, can you add it
for future releases?  It feels like it is reasonable to consider this
a property of the language (just as how it presents value is such a
property).

Shriram