[1.7.x] Fixed typo in docstring.
Backport of 029d77e from master
|@@ -254,7 +254,7 @@ def assertRedirects(self, response, expected_url, status_code=302,|
|Note that assertRedirects won't work for external links since it uses|
|TestClient to do a request (use fetch_redirect_response=False to check|
|- such links without fetching thtem).|
|+ such links without fetching them).|
|msg_prefix += ": "|