Bug#1027049: python-matplotlib-data: missing copyright file

[Jakub Wilk]

Package: python-matplotlib-data
Version: 3.6.2-3
Severity: serious
Justification: Policy §12.5

$ lintian -F python-matplotlib-data_3.6.2-3_all.deb
E: python-matplotlib-data: no-copyright-file

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Jakub Wilk