message: Fixes nccl_ops_test error introduced in CL
diff: @@ -172,8 +172,7 @@ class BroadcastTest(NcclTestCase):
  (['/device:GPU:0', '/device:CPU:0'],))
  except errors.NotFoundError as e:
  self.assertRegexpMatches(
  - e.value,
  - "No registered '_NcclBroadcastRecv' OpKernel for CPU devices")
  + str(e), "No registered '_NcclBroadcastRecv' OpKernel for CPU devices")
  else:
  # Session isn't executed when no GPU is available.
  if test.is_gpu_available():
  