Copyright for r-cran-combinat source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: combinat
Upstream-Contact: Vince Carey 
Source: https://cran.r-project.org/package=combinat

Files: *
Copyright: 1994-2012 Scott Chasalow , Alan Zaslavsky
License: GPL-2+

Files: debian/*
Copyright: 2008–2011 Steffen Moeller 
           2011-2013 Charles Plessy 
           2011-2017 Andreas Tille 
License: GPL-2+

License: GPL-2+
 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 2 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, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 .
 On a Debian GNU/Linux system, the GNU General Public License version 2 is
 included in the file ‘/usr/share/common-licenses/GPL-2’.