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svn:author
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avg
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svn:date
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2022-02-08T16:17:23.719435Z
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V 244
schedgraph.py: port to Python 3

The change does not preserve compatibility with Python 2.7.

(cherry picked from commit 7e8ed296e120a57211d377102fa27dd9411d0fbd)

Git Hash:   b76c310366878ff100c86a303bea98cb7664b08d
Git Author: avg@FreeBSD.org
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