Show 'Documents referred to' for xanadocs.

sourcing/templates/view.html

@@ -121,7 +121,7 @@
     <p>There are no documents that refer to this {{ doc.type }}.</p>
 {% endif %}
 
-  {% if doc.type == 'xanalink' %}
+  {% if doc.type != 'sourcedoc' %}
     <h4>Documents referred to</h4>
     {% set object_count = doc.objects.count() %}
     {% if object_count %}