build

Restructure IRB's documentation #4196

Job	Run time
lint	12s
Debug compatibility test	5m 56s
ruby-versions / Generate Ruby versions	1s
rake test 2.7 (latest reline)	1m 35s
vterm-yamatanooroti 2.7 (latest reline)	49s
rake test 2.7	1m 35s
vterm-yamatanooroti 2.7	50s
rake test 3.0 (latest reline)	1m 25s
vterm-yamatanooroti 3.0 (latest reline)	34s
rake test 3.0	1m 32s
vterm-yamatanooroti 3.0	33s
rake test 3.1 (latest reline)	1m 29s
vterm-yamatanooroti 3.1 (latest reline)	29s
rake test 3.1	1m 32s
vterm-yamatanooroti 3.1	31s
vterm-yamatanooroti 3.2 (latest reline)	36s
rake test 3.2 (latest reline)	1m 25s
vterm-yamatanooroti 3.2	35s
rake test 3.2	1m 26s
vterm-yamatanooroti 3.3 (latest reline)	2m 3s
rake test 3.3 (latest reline)	1m 28s
vterm-yamatanooroti 3.3	39s
rake test 3.3	1m 29s
vterm-yamatanooroti head (latest reline)	33s
rake test head (latest reline)	1m 42s
vterm-yamatanooroti head	34s
rake test head	1m 43s
	33m 16s

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