app/views/devise/passwords/edit.html.haml
.hero-unit
%h2= title "Change Your Password"
.row
.span12
= simple_form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { method: :put, class: 'form-horizontal' }) do |f|
= f.input :reset_password_token, as: :hidden
= f.input :password
= f.input :password_confirmation
.control-group
.controls
= f.submit "Change my password", class: 'btn btn-primary'