macos

[DOC] Tweaks for StringIO#close_write #515

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 3.0	35s
macos-13 3.2	25s
macos-13 3.4	22s
macos-13 3.1	21s
macos-13 debug	33s
macos-14 3.0	14s
macos-13 2.7	58s
macos-13 3.3	28s
macos-14 2.7	28s
macos-14 3.4	13s
macos-14 jruby-head	53s
macos-14 3.3	17s
macos-13 jruby-head	1m 58s
macos-14 head	21s
macos-14 3.2	23s
macos-14 3.1	16s
macos-13 head	32s
macos-14 debug	22s
	9m 44s

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