test

Support parser generation without %union directive (Bison compatibility) #2159

Job	Run time
test-memory (head)	39s
check-misc (head)	17s
test-windows (head)	1m 41s
test-ruby (3.1, master)	6m 18s
test-ruby (head, master)	6m 21s
steep-check (3.4)	42s
ruby-versions / Generate Ruby versions	3s
test-cpp (head, g++)	26s
test-c (head, gcc)	22s
test-cpp (head, clang++)	24s
test-c (head, clang)	22s
test-c (head, cc)	20s
test (3.0)	34s
test (2.5)	40s
test (3.2)	27s
test (head)	20s
test (3.3)	23s
test (3.1)	21s
test (3.4)	26s
test (2.7)	41s
test (2.6)	41s
	22m 28s

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