Fixed #19039 - Python 3.3 fails unit test for duplicate bad cookies

Thanks to clelland for the report.

tests/regressiontests/httpwrappers/tests.py

@@ -569,7 +569,7 @@ class CookieTests(unittest.TestCase):
         """
         Test that a repeated non-standard name doesn't affect all cookies. Ticket #15852
         """
-        self.assertTrue('good_cookie' in parse_cookie('a,=b; a,=c; good_cookie=yes').keys())
+        self.assertTrue('good_cookie' in parse_cookie('a:=b; a:=c; good_cookie=yes').keys())
 
     def test_httponly_after_load(self):
         """