This is the Debian prepackaged version of the GNU diffutils package. GNU `diff' was written by Mike Haertel, David Hayes, Richard Stallman, Len Tower, and Paul Eggert. Wayne Davison designed and implemented the unified output format. GNU `diff3' was written by Randy Smith. GNU `sdiff' was written by Thomas Lord. GNU `cmp' was written by Torbjorn Granlund and David MacKenzie. The source for this release was obtained from https://ftp.gnu.org/gnu/diffutils/diffutils-3.7.tar.xz Program copyright and license: ============================= Copyright (C) 1988-1996, 1998, 2001-2002, 2004, 2006-2007, 2009-2013, 2015-2018 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. On Debian systems, the complete text of the GNU General Public License may be found in `/usr/share/common-licenses/GPL'. Manual copyright and license: ============================ Copyright (C) 1992-1994, 1998, 2001-2002, 2004, 2006, 2009-2018 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. On Debian systems, the complete text of the GNU Free Documentation License may be found in `/usr/share/common-licenses/GFDL'.