`no_repeat` option #416

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (3.0)	46s
test (3.1)	36s
test (3.2)	46s
test (3.3)	38s
test (3.4)	37s
test (debug)	1m 2s
test (head)	37s
	5m 5s

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