message: Converting string to binary strings
diff: @@ -758,7 +758,7 @@ class CopyToDeviceTest(test.TestCase):
  with self.test_session() as sess:
  sess.run(iterator.initializer)
  - self.assertAllEqual(["a", "b", "c"], sess.run(next_element))
  + self.assertAllEqual([b"a", b"b", b"c"], sess.run(next_element))
  with self.assertRaises(errors.OutOfRangeError):
  sess.run(next_element)
  @@ -776,7 +776,7 @@ class CopyToDeviceTest(test.TestCase):
  with self.test_session() as sess:
  sess.run(iterator.initializer)
  - self.assertAllEqual(["a", "b", "c"], sess.run(next_element))
  + self.assertAllEqual([b"a", b"b", b"c"], sess.run(next_element))
  with self.assertRaises(errors.OutOfRangeError):
  sess.run(next_element)
  