HtmlSanitizer becomes Python 2.6 compatible. The Cleaner class must not have any arguments when calling __init__ function for the object class, because in this case Python 2.6 raises TypeError (while previous versions just ignored them).

<tr align="left">
{% block first %}
  <th class="first" align="right">Title</th>
{% endblock first %}
  <th>Difficulty</th>
  <th>Type</th>
  <th>Time To Complete</th>
  <th>Status</th>
  <th>Mentors</th>
</tr>