[DOC] RDoc for additions #178

Job	Run time
ruby-versions / Generate Ruby versions	2s
ubuntu-20.04 2.3	53s
ubuntu-20.04 2.4	1m 3s
ubuntu-20.04 2.5	1m 0s
ubuntu-20.04 2.6	1m 8s
ubuntu-20.04 2.7	55s
ubuntu-20.04 3.0	25s
ubuntu-20.04 3.1	19s
ubuntu-20.04 3.2	17s
ubuntu-20.04 head	24s
ubuntu-20.04 jruby	1m 8s
ubuntu-20.04 jruby-head	1m 12s
ubuntu-20.04 truffleruby	49s
ubuntu-20.04 truffleruby-head	1m 2s
ubuntu-22.04 2.3	58s
ubuntu-22.04 2.4	53s
ubuntu-22.04 2.5	54s
ubuntu-22.04 2.6	59s
ubuntu-22.04 2.7	1m 0s
ubuntu-22.04 3.0	21s
ubuntu-22.04 3.1	25s
ubuntu-22.04 3.2	22s
ubuntu-22.04 head	21s
ubuntu-22.04 jruby	1m 3s
ubuntu-22.04 jruby-head	1m 8s
ubuntu-22.04 truffleruby	47s
ubuntu-22.04 truffleruby-head	57s
macos-11 2.3	2m 12s
macos-11 2.4	2m 13s
macos-11 2.5	2m 3s
macos-11 2.6	2m 13s
macos-11 2.7	2m 7s
macos-11 3.0	37s
macos-11 3.1	41s
macos-11 3.2	42s
macos-11 head	34s
macos-11 jruby	1m 19s
macos-11 jruby-head	1m 26s
macos-11 truffleruby	1m 31s
macos-11 truffleruby-head	1m 45s
macos-12 2.3	2m 50s
macos-12 2.4	2m 57s
macos-12 2.5	2m 20s
macos-12 2.6	2m 17s
macos-12 2.7	2m 51s
macos-12 3.0	38s
macos-12 3.1	27s
macos-12 3.2	37s
macos-12 head	33s
macos-12 jruby	1m 57s
macos-12 jruby-head	2m 2s
macos-12 truffleruby	2m 30s
macos-12 truffleruby-head	1m 50s
windows-latest 2.3	1m 59s
windows-latest 2.4	2m 32s
windows-latest 2.5	3m 52s
windows-latest 2.6	3m 31s
windows-latest 2.7	2m 54s
windows-latest 3.0	1m 20s
windows-latest 3.1	1m 53s
windows-latest 3.2	1m 46s
windows-latest head	1m 40s
windows-latest mswin	1m 28s
ubuntu-latest jruby-9.1	1m 12s
ubuntu-latest jruby-9.2	1m 24s
ubuntu-latest jruby-9.3	1m 8s
	1h 30m 36s

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