GNU diff was written by Paul Eggert, Mike Haertel, David Hayes, Richard Stallman, and Len Tower. 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 diffutils manual was written by David MacKenzie, Paul Eggert, and Richard Stallman. Parts are adapted by from a manual page written by Larry Wall, with his permission. Many other people have contributed to GNU diffutils, including Wayne Davison, Patrick D'Cruze, F. Thomas May, Greg McGary, Chip Rosenthal, and Eli Zaretskii. The following contributions warranted legal paper exchanges with the Free Software Foundation. Also see the files ChangeLog and THANKS. Leonard H. Tower Jr. Torbjorn Granlund Mike Haertel David S. Hayes Randall Smith Richard Stallman F. Thomas May Wayne Davison Paul R. Eggert Chip Rosenthal Wayne Davison Patrick D'Cruze Eli Zaretskii Copyright (C) 2001, 2006, 2009-2013, 2015-2017 Free Software Foundation, Inc. This file is part of GNU diffutils. 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. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.