Fixed a typo in r17638.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17639 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/introspection/tests.py

@@ -91,7 +91,7 @@ def test_get_table_description_types(self):
 
     # Oracle forces null=True under the hood in some cases (see
     # https://docs.djangoproject.com/en/dev/ref/databases/#null-and-empty-strings)
-    # so its idea about null_ok in cursor.drescription is different from ours
+    # so its idea about null_ok in cursor.description is different from ours.
     @skipIfDBFeature('interprets_empty_strings_as_nulls')
     def test_get_table_description_nullable(self):
         cursor = connection.cursor()