Don't test for preserved whitespace with older Rails versions.
Don't test for preserved whitespace with older Rails versions.

sideci-sample/sideci-sample-haml,nazar-pc/haml,haml/haml,haml/haml,keithpitty/haml,macressler/haml,stanhu/haml,dg1dd1ngs/haml,stanhu/haml,nazar-pc/haml,tangposmarvin/haml,macressler/haml,haml/haml,dg1dd1ngs/haml,tangposmarvin/haml,haml/haml,keithpitty/haml