title: How define textarea content on form edit (Symfony2/TWIG)
body: <p>I want to display a specific content in my editForm textarea so I try like text field but it doesn't work :</p>
  
  <pre><code>{{ form_widget(edit_form.description, { 'attr': {'value': 'content'} }) }} {{ form_errors(edit_form.description) }}
  </code></pre>
  
  <p>How can I do it in TWIG ?</p>