Copyright for shellcheck source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ShellCheck
Upstream-Contact: Vidar Holen 
Source: https://hackage.haskell.org/package/ShellCheck
 Also http://www.shellcheck.net/
 and https://github.com/koalaman/shellcheck

Files: *
Copyright: 2012-2015 Vidar Holen
License: GPL-3+
 ShellCheck 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.
 .
 ShellCheck 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.
 .
 On Debian systems, the complete text of the GNU General Public License
 can be found in `/usr/share/common-licenses/GPL-3'.