Resolve "Add export functionality to course book"

Closes #258 (closed)

aleksis/apps/alsijil/templates/alsijil/partials/register_members_table.html

@@ -37,7 +37,6 @@
       {% for absence_reason in absence_reasons_not_counted %}
         <td>{{ person|get_dict:absence_reason.count_label }}</td>
       {% endfor %}
-      <!-- TODO: First was person.tardiness; not shure sum is the right equivalent. -->
       <td>{{ person.tardiness_sum }}'/{{ person.tardiness_count }}&times;</td>
       {% for extra_mark in extra_marks %}
         <td>{{ person|get_dict:extra_mark.count_label }}</td>