Improve doc #1229

Job	Run time
Coding Style \| 3.0	33s
Main Gem Specs \| RuboCop: master \| 2.7	2m 2s
Prism	23s
Main Gem Specs \| RuboCop: master \| 3.0	1m 42s
Specs \| 2.7	43s
Main Gem Specs \| RuboCop: v1.61.0 \| 3.3	1m 59s
Specs \| 3.0	32s
Specs \| 3.1	27s
Specs \| 3.2	30s
Specs \| 3.3	31s
Specs \| head	29s
Coverage \| 2.7	45s
Specs "modern" \| 3.0	29s
Specs \| jruby	49s
Specs \| jruby-head	42s
Specs \| truffleruby	59s
Specs \| truffleruby-head	1m 14s
	14m 49s

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