Unshadow 'test_to_string'.

Author: tseaver

tests/test_oauth.py

@@ -216,7 +216,7 @@ def _compare_tokens(self, new):
         # TODO: What about copying the verifier to the new token?
         # self.assertEqual(self.token.verifier, new.verifier)
 
-    def test_to_string(self):
+    def test___str__(self):
         tok = oauth.Token('tooken', 'seecret')
         self.assertEqual(str(tok),
                          'oauth_token_secret=seecret&oauth_token=tooken')