Copyright for haskell-hs-bibutils source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: https://hackage.haskell.org/package/hs-bibutils
Upstream-Name: hs-bibutils

Files: *
Copyright: © 2008, Andrea Rossato 
License: GPL
 On Debian systems, the complete text of the GNU General Public License
 version 2 can be found in `/usr/share/common-licenses/GPL-2'.

Files: debian/*
Copyright: © 2011, Giovanni Mascellani 
License: GPL-3+
 On Debian systems, the complete text of the GNU General Public License
 version 3 can be found in `/usr/share/common-licenses/GPL-3'.

Files: bibutils/*
Copyright: 1995-2009 Christopher Putnam 
License: GPL-2+
 On Debian systems, the complete text of the GNU General Public License
 version 2 can be found in `/usr/share/common-licenses/GPL-2'.
Comment: This convenience copy of libbibutils is not used by the Debian package.