Copyright for gnome-tweaks source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: GNOME Tweaks
Source: https://download.gnome.org/sources/gnome-tweaks/

Files: *
Copyright: 2011-2013 John Stowers
License: GPL-3+

Files: gtweak/gtksettings.py
Copyright: 2012 Cosimo Cecchi
License: GPL-3+

Files: gtweak/tweaks/tweak_group_sound.py
Copyright: 2017 Canonical
License: GPL-3+

Files: gtweak/tweaks/tweak_wacom.py
       gtweak/tweaks/tweak_group_xkb.py
Copyright: 2012, 2013 Red Hat, Inc.
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 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 3 can be found in "/usr/share/common-licenses/GPL-3".