macos

[DOC] Tweaks for StringIO.new #490

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 3.2	56s
macos-13 3.3	44s
macos-13 2.7	1m 28s
macos-13 3.0	1m 5s
macos-13 3.1	42s
macos-13 3.4	43s
macos-13 debug	46s
macos-14 3.2	29s
macos-13 head	34s
macos-14 3.4	24s
macos-14 3.3	18s
macos-14 3.1	20s
macos-14 3.0	17s
macos-14 jruby-head	52s
macos-14 2.7	35s
macos-14 debug	24s
macos-14 head	20s
macos-13 jruby-head	1m 8s
	12m 10s

Provide feedback