Fixed small typo in overview

git-svn-id: http://code.djangoproject.com/svn/django/trunk@90 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/overview.txt

@@ -91,7 +91,7 @@ is created on the fly: No code generation necessary::
     >>> reporters.get_object(id__exact=2)
     Traceback (most recent call last):
         ...
-    django.models.polls.ReporterDoesNotExist: Reporter does not exist for {'id__exact': 2}
+    django.models.news.ReporterDoesNotExist: Reporter does not exist for {'id__exact': 2}
 
     # Create an article.
     >>> from datetime import datetime