message: Fix byte compare
  Summary: Comparea single byte to a single byte
  Test Plan:
  All tests pass (python3), plus i've checked this expression
  on a python2 shell
  Reviewers: georgep, jakeh
diff: @@ -276,9 +276,9 @@ class IpuIpuModelTest(test_util.TensorFlowTestCase):
  self.assertEqual(len(evts), 3) # begin, end, execute
  self.assertEqual(evts[1].compile_end.compilation_report[0],
  - bytes(bytearray([217])))
  + bytes(bytearray([217]))[0])
  self.assertEqual(evts[2].execute.execution_report[0],
  - bytes(bytearray([217])))
  + bytes(bytearray([217]))[0])
  def testIpuEventsWithoutPoplarReporting(self):
  with ops.device("/device:IPU:0"):
  