Ruby

Merge pull request #2967 from zonuexe/fix/stdlib-signature-corrections #8194

Job	Run time
clang_compile (head)	47s
C99_compile (4.0)	49s
C99_compile (head)	48s
clang_compile (4.0)	48s
test (3.3, test)	2m 23s
test (4.0, test, --enable-frozen-string-literal)	2m 23s
test (4.0, test)	2m 28s
test (3.2, test)	2m 11s
test (3.4, test)	2m 23s
test (asan-release, test)	7m 30s
test (head, test)	2m 3s
test (head, stdlib_test rubocop)	1m 53s
test (4.0, stdlib_test, --enable-frozen-string-literal)	1m 43s
test (4.0, stdlib_test)	1m 48s
test (4.0, rubocop validate test_doc build test_generate_stdlib raap)	2m 30s
test (4.0, typecheck_test)	1m 39s
	34m 6s

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