Remove superflous <p>.

biscuit/core/templates/contact_form/support/sent.html

@@ -6,10 +6,8 @@
 
 {% block content %}
  <div class="alert alert-success" role="alert">
-  <p>
-   {% blocktrans %}
-    The message was successfully submitted.
-   {% endblocktrans %}
-  </p>
+  {% blocktrans %}
+   The message was successfully submitted.
+  {% endblocktrans %}
  </div>
 {% endblock %}