Assume ActiveSupport::SafeBuffer exists
Assume ActiveSupport::SafeBuffer exists

Since haml 3.2 only supports rails 3 and ActiveSupport::SafeBuffer has existed
since rails 3 we can remove the defined? check.
tangposmarvin/haml,macressler/haml,tangposmarvin/haml,macressler/haml,sideci-sample/sideci-sample-haml,nazar-pc/haml,stanhu/haml,haml/haml,nazar-pc/haml,keithpitty/haml,keithpitty/haml,haml/haml,dg1dd1ngs/haml,haml/haml,amatsuda/haml,haml/haml,stanhu/haml,dg1dd1ngs/haml