Minor tweeks to rakefile document changes.
Minor tweeks to rakefile document changes.

codedogfish/rake,askl56/rake,ipmobiletech/rake,Vanzct/rake,hsbt/rake,zzak/rake,tmornini/rake,esasse/rake,hsbt/rake,taiganakagawa/rake,pjump/rake,envato/rake,envato/rake,bentley/rake,88rabbit/rake,utilum/rake,jaustinhughey/rake,ruby/rake,ruby/rake