Improved test coverage and error messages for conf.urls.__init__.

1 files changed, 4 insertions, 3 deletions

diff --git a/django/conf/urls/__init__.py b/django/conf/urls/__init__.py
index 16db0f2fea..47d6b310e2 100644
--- a/django/conf/urls/__init__.py
+++ b/django/conf/urls/__init__.py
@@ -22,12 +22,13 @@ def include(arg, namespace=None):
         except ValueError:
             if namespace:
                 raise ImproperlyConfigured(
-                    'Cannot override the namespace for a dynamic module that provides a namespace'
+                    'Cannot override the namespace for a dynamic module that '
+                    'provides a namespace.'
                 )
             raise ImproperlyConfigured(
-                'Passing a 3-tuple to django.conf.urls.include() is not supported. '
+                'Passing a %d-tuple to django.conf.urls.include() is not supported. '
                 'Pass a 2-tuple containing the list of patterns and app_name, '
-                'and provide the namespace argument to include() instead.',
+                'and provide the namespace argument to include() instead.' % len(arg)
             )
     else:
         # No namespace hint - use manually provided namespace