
  [;1m-spec display_string(Device, P1) -> true[0m
  [;1m                        when[0m
  [;1m                            Device :: stdin | stdout | stderr,[0m
  [;1m                            P1 :: string().[0m

  The documentation for display_string/2 is hidden. This probably
  means that it is internal and not to be used by other
  applications.
