title: Including partial template
body: <p>In sinatra's app,</p>
  
  <pre><code>require 'rubygems'
  require 'sinatra'
  require 'haml'
  
  get '/new' do
    haml :new
  end
  
  get '/edit' do
    haml :edit
  end
  
  __END__
  
  @@ layout
  %html
    %head
      %title
    %body
    = yield
  
  @@ _form
  # partial form
  
  @@ new
  %h1 Add a new item
  # require partial _form
  
  @@ edit
  %h1 Edit an existing item
  # require partial _form
  </code></pre>
  
  <p>How to require the partial <code>@@ _form</code> template in <code>@@ new</code> and <code>@@ edit</code>?</p>
  
  <p>Thank you.</p>