Fixed #4534 -- Added an "else" option to the "ifchanged" template tag.

Patch from SmileyChris.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8095 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/templates.txt

@@ -828,6 +828,19 @@ The 'ifchanged' block tag is used within a loop. It has two possible uses.
             {% endifchanged %}
         {% endfor %}
 
+The ``ifchanged`` tag also takes an optional ``{% else %}`` clause that will
+be displayed if the value has not changed::
+
+    {% for match in matches %}
+        <div style="background-color:
+            {% ifchanged match.ballot_id %}
+                {% cycle red,blue %}
+            {% else %}
+                grey
+            {% endifchanged %}
+        ">{{ match }}</div>
+    {% endfor %}
+
 ifequal
 ~~~~~~~