test

Use `if_clause` instead of symbols #495

Job	Run time
check-misc (head)	7s
test-memory (head)	2m 3s
steep-check (head)	17s
test-ruby (head, master)	6m 33s
test-ruby (3.0, master)	6m 29s
test-windows (head)	1m 44s
ruby-versions / Generate Ruby versions	5s
test (2.5)	27s
test (2.6)	26s
test (2.7)	28s
test (3.0)	16s
test (3.1)	17s
test (3.2)	17s
test (3.3)	11s
test (head)	16s
	19m 56s

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