Ruby

Merge pull request #2989 from ksss/test-stdlib-signature-corrections #8279

Job	Run time
clang_compile (4.0)	51s
C99_compile (head)	58s
clang_compile (head)	47s
test (4.0, rubocop validate test_doc build test_generate_stdlib raap)	2m 21s
test (4.0, stdlib_test, --enable-frozen-string-literal)	1m 52s
test (3.4, test)	2m 32s
test (3.2, test)	2m 20s
test (head, stdlib_test rubocop)	2m 19s
test (4.0, test)	2m 24s
test (4.0, stdlib_test)	1m 30s
C99_compile (4.0)	1m 4s
test (4.0, test, --enable-frozen-string-literal)	2m 16s
test (4.0, typecheck_test)	1m 13s
test (head, test)	2m 10s
test (3.3, test)	2m 29s
test (asan-release, test)	6m 10s
	33m 16s

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