Corrected typo.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8082 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/test_client_regress/models.py

@@ -309,7 +309,7 @@ def test_exception_cleared(self):
         except SuspiciousOperation:
             self.fail("Staff should be able to visit this page")
 
-# We need two different tests to check URLconf subsitution -  one to check
+# We need two different tests to check URLconf substitution -  one to check
 # it was changed, and another one (without self.urls) to check it was reverted on
 # teardown. This pair of tests relies upon the alphabetical ordering of test execution.
 class UrlconfSubstitutionTests(TestCase):