Fixed typo in docs/topics/auth/customizing.txt.
@@ -3,8 +3,8 @@ Customizing authentication in Django
====================================
The authentication that comes with Django is good enough for most common cases,
-but you may have needs not met by the out-of-the-box defaults. To customize
-authentication to your projects needs involves understanding what points of the
+but you may have needs not met by the out-of-the-box defaults. Customizing
+authentication in your projects requires understanding what points of the
provided system are extensible or replaceable. This document provides details
about how the auth system can be customized.
