Copyright for ptask source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ptask
Source: http://wpitchoune.net/blog/ptask/

Files: *
Copyright: Copyright(c) 2010-2013 Jean-Philippe Orsini 
License: GPL-2+

Files: tests/checkpatch.pl
Copyright: (c) 2001, Dave Jones. (the file handling bit)
           (c) 2005, Joel Schopp  (the ugly bit)
           (c) 2007,2008, Andy Whitcroft  (new conditions, test suite)
           (c) 2008-2010 Andy Whitcroft 
License: GPL-2

Files: debian/*
Copyright: 2015 ChangZhuo Chen (陳昌倬) 
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; version 2 of the License.
 .
 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".

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".