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%% SPDX-License-Identifier: Apache-2.0
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[;1m  io_device()[0m

  An IO device as returned by [;;4mopen/2[0m.

  [;;4mio_server/0[0m is returned by default and [;;4mfd/0[0m is returned if the [;;4m[0m
  [;;4mraw[0m option is given.
