gistfile1.twig

{% block content %}
  {% if subscribe %}
    <p>{{ 'newsletter.title.subscribe_success'|trans }}</p>
  {% else %}
    <p>{{ 'newsletter.title.unsubscribe_success'|trans }}</p>
  {% endif %}
  <script type="text/javascript">
    window.addEvent('domready', function()
    {
      location.href = '{{ back_url }}';
    });
  </script>
{% endblock %}