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
Program copyright and license:
Copyright (C) 1988-1996, 1998, 2001-2002, 2004, 2006-2007, 2009-2011
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, 2009-2011 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'.