Copyright @copyright{} 1989, 1992, 1993, 1994, 1995, 1996, 2014 Free Software
Foundation, Inc.

Copyright @copyright{} 1995, 1996 Joseph Arceneaux.

Copyright @copyright{} 1999, Carlo Wood.

Copyright @copyright{} 2001, David Ingamells.

Copyright @copyright{} 2013, Łukasz Stelmach.

Copyright @copyright{} 2015, Tim Hentenaar.

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