Merge pull request #448 from eregon/excludes-arg #1522

Job	Run time
benchmark-default (truffleruby)	14m 51s
benchmark-default (head)	11m 5s
test (ruby)	1m 2s
benchmark-default (ruby)	11m 13s
benchmark-ractor (ruby)	13m 6s
benchmark-ractor (head)	12m 16s
test (head)	55s
test (truffleruby)	1m 9s
benchmark-ractor-only (head)	48s
benchmark-run-once	1m 33s
benchmark-ractor-only (ruby)	53s
benchmark-graph	56s
all-tests	2s
	1h 9m 49s

Provide feedback