Console.MakeSourcemodule Io : sig ... endinclude S
with type 'a io := 'a Io.t
and type 'a io_fmt := 'a Io.fmt
and type out_channel := Io.out_channelThe width in characters of the current output. Returns `Not_a_tty if stdout is not connected to a tty.
print a list in a columnize way (like the output of ls)