<th><a href="?sort_by={% if sort_by == "comment" %}-{% endif %}comment">comment</a></th>
</tr>
{% for todo in todos %}
<tr>
<td>[{% if todo.is_done %}x{% else %} {% endif %}]</td>
<td><a href="{{todo.date}}">{{todo.date}}</a></td>
<th><a href="?sort_by={% if sort_by == "comment" %}-{% endif %}comment">comment</a></th>
</tr>
{% for todo in todos %}
<tr>
<td>[{% if todo.is_done %}x{% else %} {% endif %}]</td>
<td><a href="{{todo.date}}">{{todo.date}}</a></td>