macos

[DOC] Tweaks for StringIO#gets #607

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 2.7	1m 15s
macos-13 3.1	23s
macos-13 3.2	21s
macos-13 3.3	29s
macos-13 3.4	36s
macos-13 debug	33s
macos-13 head	33s
macos-14 3.0	15s
macos-13 jruby-head	1m 32s
macos-14 2.7	44s
macos-14 3.3	15s
macos-14 3.1	22s
macos-14 3.2	17s
macos-14 3.4	16s
macos-14 head	16s
macos-14 jruby-head	41s
macos-14 debug	20s
macos-13 3.0	42s
	9m 55s

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