New port: textproc/py-patiencediff

This package contains the Python implementation of the "Patience Diff"
algorithm, as first described by Bram Cohen.

"Patience Diff" provides a good balance of performance, nice output for humans,
and implementation simplicity.

The code in this package was extracted from the Bazaar code base.

WWW: https://pypi.org/project/patiencediff/

PR: 238299
Submitted by: fullermd@over-yonder.net
Tested by: pkubaj (PowerPC64)