Ticket #3781: add_ons.diff

docs/add_ons.txt

@@ -9 +9 @@
 This code lives in ``django/contrib`` in the Django distribution. Here's a
 rundown of the packages in ``contrib``:
 
+.. admonition:: Note
+
+    Remember that to use these, you'll need to add the package (django.contrib.whatever) 
+    to the ``INSTALLED_APPS`` in your ``settings.py`` file, and re-run ``manage.py syncdb``.
+
 .. _"batteries included" philosophy: http://docs.python.org/tut/node12.html#batteries-included
 
 admin
@@ -157 +162 @@
     * Markdown
     * ReST (ReStructured Text)
 
-For documentation, read the source code in django/contrib/markup/templatetags/markup.py.
+To activate these filters, add ``'django.contrib.markup'`` to your ``INSTALLED_APPS``
+setting. Once you've done that, use ``{% load markup %}`` in a template, and you'll
+have access to these filters. For more documentation, read the source code in 
+django/contrib/markup/templatetags/markup.py.
 
 redirects
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