Copyright for qcustomplot source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: QCustomPlot
Upstream-Contact: support@qcustomplot.com
Source: http://www.qcustomplot.com/
Files-Excluded:
 documentation/*.qch
 documentation/html/*.js

Files: *
Copyright: 2011-2015, Emanuel Eichhammer
License: GPL-3+
 On Debian systems the full text of the GPL License
 version 3.0 can be found in the file
 /usr/share/common-licenses/GPL-3