documentation bug - io

http://www.erla
ng.org/doc/man/io.html

"setopts([IoDevice,] Opts) -> ok | {error, Reason}

Types:

IoDevice = io_device()
Opts = [Opt]
  Opt = binary | list
Reason = term()

Set options for standard input/output (IoDevice). Possible
options are:

binary
    ...
list
    ...
expand_fun
    Provide a function for tab-completion ..."

The 'expand_fun' format is, I assume, {expand_fun, Fun}, but
this
is not clearly stated in the documentation, nor is
expand_fun
represented in the type grammar.

Otherwise - nice option.  (:

BR,
Ulf W
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