message: This is a cosmetic change to logging, which makes it easier to understand this message when TPU nodes have a huge number of devices attached.
diff: @@ -120,7 +120,8 @@ def _query_tpu_system_metadata(master_address, run_config,
  logging.info('*** Num TPU Workers: %d', metadata.num_hosts)
  logging.info('*** Num TPU Cores Per Worker: %d',
  metadata.num_of_cores_per_host)
  - logging.info('*** Available Devices: %s', metadata.devices)
  + for device in metadata.devices:
  + logging.info('*** Available Device: %s', device)
  else:
  logging.info('Failed to find TPU: %s', metadata)
  return metadata
  