Copyright for gfm source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: tilp
Upstream-Contact: Lionel Debroux 
Source: https://sourceforge.net/projects/tilp
Comment: This package was created by Romain LIEVIN  in
 2002.  It was taken over by Krzysztof Burghardt 
 around 2007.  Since 2012 Albert Huang  worked
 on the package.  It is now team-maintained in Debian-Science.
 .
 Upstream Authors: Tyler Cassidy 
                   Romain Liévin 
                   Kevin Kofler 
 .
 Additional contributions by:
                   Jon Sturm 
                   Benjamin Moody 
                   Lionel Debroux 
 and countless others that have not been named here, but whose
 contributions are valuable and are very much appreciated.

Files: *
Copyright: 1999-2009 Romain Liévin
           2000-2001 Thomas Corvazier
           2001-2007 the GFM team
           2003 Julien Blache
           2005-2007 Kevin Kofler
           2006-2007 Tyler Cassidy
License: GPL-2+

Files: debian/*
Copyright: 2002-2009 Romain Liévin 
           2009 Krzysztof Burghardt 
           2012 Albert Huang 
           2013, 2018 Andreas B. Mundt 
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 package; if not, write to the Free
 Software Foundation, Inc., 51 Franklin St, 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'.