Copyright for imediff source package in Bullseye

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: imediff
Source: https://github.com/osamuaoki/imediff

Files:     *
Copyright: 2003-2004 Jarno Elonen 
           2015-2018 Osamu Aoki 
License:   GPL-2.0+
 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 complete text of the GNU General Public License
 Version 2 can be found in `/usr/share/common-licenses/GPL-2'.