Copyright for r-cran-irkernel source package in Mantic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: IRkernel
Upstream-Contact: Philipp Angerer 

Files: *
Copyright: 2014-2019 Thomas Kluyver 
           2014-2019 Philipp A. 
           2014-2019 Jan Schulz 
License: MIT

Files: debian/*
Copyright: 2019 Gordon Ball 
License: MIT

Files: tests/testthat/jkt/*
Copyright: 2015-2018 Jupyter Development Team
License: BSD-3-clause
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 list of conditions and the following disclaimer.
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 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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License: MIT
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 a copy of this software and associated documentation files (the
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