[1.3.X] Fixed #15887 - Added clarification for required_*() decorator…

…s; thanks RoySmith for the sugggestion.

Backport of r16139 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@16140 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/topics/http/decorators.txt

@@ -10,8 +10,9 @@ various HTTP features.
 Allowed HTTP methods
 ====================
 
-The following decorators in :mod:`django.views.decorators.http` can be used to
-restrict access to views based on the request method.
+The decorators in :mod:`django.views.decorators.http` can be used to restrict
+access to views based on the request method. These decorators will return
+a :class:`django.http.HttpResponseNotAllowed` if the conditions are not met.
 
 .. function:: require_http_methods(request_method_list)