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(*                                                                        *)
(*                                 OCaml                                  *)
(*                                                                        *)
(*        Nicolas Pouillard, projet Gallium, INRIA Rocquencourt           *)
(*                                                                        *)
(*   Copyright 2006 Institut National de Recherche en Informatique et     *)
(*     en Automatique.                                                    *)
(*                                                                        *)
(*   All rights reserved.  This file is distributed under the terms of    *)
(*   the GNU Lesser General Public License version 2.1, with the          *)
(*   special exception on linking described in the file LICENSE.          *)
(*                                                                        *)
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(* Ask user a yes or no question. *)
val yes_or_no : string -> bool