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README specify MPF = Gringarten #1819

Job	Run time
check	44s
py38 (ubuntu)	10m 11s
py310 (ubuntu)	10m 26s
py39 (ubuntu)	10m 19s
py311 (windows)	12m 36s
py311 (ubuntu)	10m 3s
docs	1m 6s
py39 (windows)	11m 1s
py311 (macos)	7m 35s
py310 (windows)	12m 27s
Deploy docs to GitHub Pages	1m 8s
Upload coverage to Coveralls	10m 4s
	1h 37m 40s

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