Fixed #16498 -- Fixed typo in GenericIPAddressField docs. Thanks, JshWright.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16559 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/models/fields.txt

@@ -769,7 +769,7 @@ as an ``<input type="text">`` (a single-line input).
 ``GenericIPAddressField``
 -------------------------
 
-.. class:: GenericIPAddressField([protocols=both, unpack_ipv4=False, **options])
+.. class:: GenericIPAddressField([protocol=both, unpack_ipv4=False, **options])
 
 .. versionadded:: 1.4