message: Fix "No duplicates allowed" error message
diff: @@ -454,7 +454,7 @@ class MirroredExtended(distribute_lib.DistributionStrategyExtended):
  assert devices, "Must specify at least one device."
  devices = tuple(device_util.resolve(d) for d in devices)
  assert len(set(devices)) == len(devices), (
  - "No duplicates allowed in `devices` argument: %s" % devices)
  + "No duplicates allowed in `devices` argument: %s" % (devices,))
  # TODO(josh11b): Require at least 2 devices?
  self._device_map = values.ReplicaDeviceMap(devices)
  self._input_workers = input_lib.InputWorkers(self._device_map)
  