Fix whitespace at EOL/EOF

Ensure there is no trailing whitespace on lines
and the last line of a file ends with a newline.

biscuit/apps/mensa/templates/menu/upload.html

@@ -44,4 +44,4 @@
         <a href="{% url 'menu_index' %}" class="waves-effect waves-teal btn-flat">Zurück zur Übersicht</a>
     </p>
 </main>
-{% include 'partials/footer.html' %}
\ No newline at end of file
+{% include 'partials/footer.html' %}