add a test for form_for that tests lack of indentation.
add a test for form_for that tests lack of indentation.

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