Copyright for mma source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: mma
Source: https://www.mellowood.ca/mma/downloads.html

Files: *
Copyright: 2003–2021 Bob van der Poel 
License: GPL-2+

Files: debian/*
Copyright: 2011–2012 Joel Roth 
           2015–2017 Anthony Fok 
License: GPL-2+
Comment:
 The previous official Debian mma package was debianized by
 Raphael Goulais  on Tue, 13 Jan 2004 13:20:25 +0100.
 .
 Joel Roth  and Miguel A. Colón Vélez 
 worked on this package in 2011 and 2012 and committed their changes to
 git.debian.org, but unfortunately no release was made.

Files: debian/chords.pdf.gz
Copyright: 2003–2016 Bob van der Poel 
License: GPL-2+
Comment: Upstream MMA documentation in PDF

Files: debian/makeman
Copyright: 2012 Joel Roth 
License: GPL-2+

Files: debian/*.1 debian/*.pod
Copyright: 2000–2012 Bob van der Poel 
           2012      Joel Roth 
License: GPL-2+

License: GPL-2+
 This package 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 package 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 
 .
 On Debian systems, the complete text of the GNU General
 Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".