macos

[DOC] Doc for StringIO.getc #544

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 2.7	1m 40s
macos-13 3.1	32s
macos-13 3.0	36s
macos-13 3.4	34s
macos-13 head	38s
macos-14 2.7	42s
macos-13 3.3	37s
macos-14 3.2	29s
macos-13 jruby-head	1m 53s
macos-13 debug	59s
macos-14 3.3	17s
macos-13 3.2	39s
macos-14 3.4	22s
macos-14 3.1	20s
macos-14 3.0	19s
macos-14 debug	24s
macos-14 jruby-head	56s
macos-14 head	22s
	12m 24s

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