Copyright for galternatives source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: galternatives
Source: https://salsa.debian.org/chinese-team/galternatives

Files: *
Copyright: 2003-2006 Gustavo Noronha Silva 
           2017 Yangfl 
License: GPL-1+

Files: debian/*
Copyright: 2003-2006 Gustavo Noronha Silva 
           2017 Boyuan Yang <073plan@gmail.com>
License: GPL-1+

License: GPL-1+
 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 1 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 1 can be found in "/usr/share/common-licenses/GPL-1".