macos

[DOC] Class doc for StringIO #579

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 3.0	26s
macos-13 3.3	23s
macos-13 3.2	24s
macos-13 jruby-head	1m 27s
macos-13 3.4	22s
macos-13 2.7	1m 2s
macos-14 2.7	47s
macos-13 head	24s
macos-13 3.1	23s
macos-14 3.0	21s
macos-14 3.3	13s
macos-14 3.1	27s
macos-13 debug	29s
macos-14 jruby-head	51s
macos-14 3.4	15s
macos-14 debug	21s
macos-14 head	17s
macos-14 3.2	20s
	9m 17s

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