yardocco
YARD Templates for docco-style docs. See https://github.com/markiz/murdoc & http://jashkenas.github.com/docco/
gem install yardocco
Add require 'yardocco' to your yard generate code. Something like this:
require 'yard'
require 'yardocco'
YARD::Rake::YardocTask.new
murdoc dependency is pygments (http://pygments.org/) for highlight code.