plataformatec/simple_form — pull request #1149 by runephilosof (2014-10-10 06:43:38+00:00)
Title: Use the right wrappers as default

As can also be seen in https://github.com/rafaelfranca/simple_form-bootstrap/blob/master/app/views/examples/_basic_example_sf.html.erb#L2 these are the wanted wrappers.