Copyright for octave-optics source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Functions covering various aspects of optics
Upstream-Contact: Andreas Weber , Martin Vogel 
Source: https://octave.sourceforge.io/optics/

Files: *
Copyright: 2012, 2015 Andreas Weber 
           2013 Martin Vogel 
           2019 José Ramom Flores das Seixas 
License: GPL-3+

Files: debian/*
Copyright: 2018, 2019 Rafael Laboissiere 
License: GPL-3+

License: GPL-3+
 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 .
 .
 On Debian systems, the complete text of the GNU General Public
 License, version 3, can be found in the file
 `/usr/share/common-licenses/GPL-3'.