Copyright for python-regex source package in Nile V2.0

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

Files: *
Copyright: 2020 Matthew Barnett 
License: Apache-2.0

Files: debian/*
Copyright: 2012-2022 Sandro Tosi 
License: Apache-2.0

License: Apache-2.0
 On Debian systems, the full text of the Apache license version 2.0 can be found
 in the file `/usr/share/common-licenses/Apache-2.0` .

Files: original contributions
Copyright: copyright (c) 1998-2001 by Secret Labs AB
License: PSF
Comment:
 This work was derived from the 're' module of CPython 2.6 and CPython 3.1,
 copyright (c) 1998-2001 by Secret Labs AB and licensed under CNRI's Python 1.6
 license.

License: PSF
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