Resolve "Add export functionality to course book"

Closes #258 (closed)

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

@@ -16,7 +16,7 @@
   <tbody>
     {% for doc in group.documentations %}
       {% ifchanged doc.datetime_start.date %}
-        <tr><th colspan="6">{{ doc.datetime_start.date|date }}</th></tr>
+        <tr><th colspan="6">{{ doc.datetime_start.date|date:"D d M Y" }}</th></tr>
       {% endifchanged %}
       <tr class="
             {% if doc.amends %}