Test README

Add `TableFormat` metric #1430

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Run time

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Job	Run time
readme (3.8, ubuntu-latest)	1m 1s
readme (3.8, macos-latest)	54s
readme (3.9, ubuntu-latest)	1m 1s
readme (3.9, macos-latest)	1m 25s
readme (3.10, ubuntu-latest)	47s
readme (3.10, macos-latest)	1m 0s
readme (3.11, ubuntu-latest)	1m 0s
readme (3.11, macos-latest)	1m 21s
	8m 29s