Ruby

Fix bad scaling in `rbs_comment_t` tokens #7107

Job	Run time
C99_compile (head)	1m 18s
C99_compile (3.4)	50s
test (3.3, test)	3m 17s
test (3.1, test)	3m 6s
test (3.4, test)	3m 19s
test (3.2, test)	2m 53s
test (head, test)	3m 39s
test (head, stdlib_test rubocop)	3m 28s
test (3.4, typecheck_test)	1m 15s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 50s
test (3.4, stdlib_test)	2m 23s
test (3.4, stdlib_test, --enable-frozen-string-literal)	2m 18s
test (3.4, test, --enable-frozen-string-literal)	3m 11s
	33m 47s

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