Customize data-prototype attribute for embedded form collection in Symfony2

Customize_data-prototype_attribute.html.twig

<!-- Customize data-prototype attribute for embedded form collection in Symfony2 -->
 
<!-- form.html.twig -->
<div class="parameters" data-prototype="{% filter escape %}{% include 'AcmeApplicationBundle:Application:field-prototype.html.twig' with {'form': form.parameters.get('prototype')} %}{% endfilter %}"></div>
 
 
<!-- field-prototype.html.twig -->
<div>
<!-- Customisez le rendu ici -->
  <table>
    <tr>
      <td>
        {{ form_label(form.name1) }}
        {{ form_errors(form.name1) }}
        {{ form_widget(form.name1) }}
      </td>
      <td>
        {{ form_label(form.name2) }}
        {{ form_errors(form.name2) }}
        {{ form_widget(form.name2) }}
      </td>
    </tr>
  </table>
</div>

I am trying to render a data-prototype - as provided by the collection field type - escaped, without spaces and in a single row. Unfortunately the result looks different:
https://gist.github.com/webdevilopers/a0b551771aa634b97a57#file-data-prototype-html

Did you solve this?