Merge pull request #479 from ruby/mvh-add-p-value #1724

Job	Run time
benchmark-ractor (head)	6m 47s
benchmark-default (truffleruby, --excludes=knucleotide,lobsters,ruby-lsp,shipit)	12m 51s
benchmark-default (head)	13m 16s
benchmark-run-once	1m 38s
benchmark-ractor-only (head)	40s
test (head)	45s
benchmark-default (ruby)	13m 15s
benchmark-graph	43s
test (truffleruby)	1m 37s
test (ruby)	52s
all-tests	3s
	52m 27s

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