Changed preview to show warning when previewing a deleted revision.

wiki/templates/wiki/preview_inline.html

@@ -21,6 +21,13 @@
 
   <h1 class="page-header">{{ title }}</h1>
 
-  {% wiki_render article content %}
+  {% if revision and revision.deleted %}
+    <div class="warning">
+      <strong>This revision has been deleted.</strong> 
+      <p>Restoring to this revision will mark the article as deleted.</p>
+    </div>
+  {% else %}
+    {% wiki_render article content %}
+  {% endif %}
 
 {% endblock %}