add double blank line

Author: picnixz

Lib/test/test_capi/test_codecs.py

@@ -874,5 +874,6 @@ def do_test_codec_errors_handler(self, handler, exceptions):
             with self.subTest('bad type', handler=handler, exc=bad_exc):
                 self.assertRaises(TypeError, handler, bad_exc)
 
+
 if __name__ == "__main__":
     unittest.main()