message: Replace set(tensor) with id(tensor) for eq change
diff: @@ -366,7 +366,8 @@ class AdamOptimizerTest(test.TestCase):
  opt.minimize(lambda: v1 + v2)
  # There should be two non-slot variables, and two unique slot variables
  # for v1 and v2 respectively.
  - self.assertEqual(6, len(set(opt.variables())))
  + self.assertEqual(6, len({id(v) for v in opt.variables()}))
  +
  if __name__ == "__main__":
  test.main()
  