Copyright for bash-completion source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Files: *
Copyright: © 2006-2008, Ian Macdonald 
 © 2008-2018, Bash Completion Maintainers
License: GPL-2+

Files: debian/*
Copyright: © 2008, Luk Claes 
 © 2008, Matthias Klose 
 © 2008-2013, David Paleino 
 © 2017-2019, Gabriel F. T. Gomes 
License: GPL-2+

License: GPL-2+
 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 2
 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, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 .
 On Debian systems, the full text of the GNU General Public
 License version 2 can be found in the file
 `/usr/share/common-licenses/GPL-2'.