title: haml doesnt work for form_for? (rails 3.1)
body: <p>there is my code in controller</p>
  
  <pre><code>def new
      @user = User.new
    end
  </code></pre>
  
  <p>and there is my code in new.html.haml</p>
  
  <pre><code>- if @user.errors.any?
      #error_explanation
          %h2 Form is invalid
          %ul
              -for message in  @user.errors.full_messages
                  %li= message
              -
  -
  %section
      %h1 Sign Up
      -form_for @user do |f|
          %p
              = f.label :email
              %br
              = f.text_field :email
          %p
              = f.label :name
              %br
              = f.text_field  :name
          %p
              = f.label :password
              %br
              = f.text_field :password
          %p
              = f.label :password_confirmation
              %br
              = f.password_field :password_confirmation
          %p.button
              = f.submit
      -
  </code></pre>
  
  <p>When I go to the users/new path I have only "Sign up" on my page i dont have labels and texts fields.
  I am new to haml. What i am doing wrong?</p>