build

Update documentation about the new copy command #4309

Job	Run time
lint	8s
Debug compatibility test	5m 56s
ruby-versions / Generate Ruby versions	4s
rake test 2.7 (latest reline)	1m 37s
vterm-yamatanooroti 2.7 (latest reline)	42s
rake test 2.7	1m 36s
vterm-yamatanooroti 2.7	51s
rake test 3.0 (latest reline)	1m 36s
vterm-yamatanooroti 3.0 (latest reline)	1m 21s
rake test 3.0	1m 33s
vterm-yamatanooroti 3.0	31s
rake test 3.1 (latest reline)	1m 41s
vterm-yamatanooroti 3.1 (latest reline)	32s
rake test 3.1	1m 45s
vterm-yamatanooroti 3.1	29s
rake test 3.2 (latest reline)	1m 33s
vterm-yamatanooroti 3.2 (latest reline)	31s
rake test 3.2	1m 39s
vterm-yamatanooroti 3.2	37s
rake test 3.3 (latest reline)	1m 52s
vterm-yamatanooroti 3.3 (latest reline)	29s
rake test 3.3	1m 57s
vterm-yamatanooroti 3.3	32s
rake test 3.4 (latest reline)	2m 12s
vterm-yamatanooroti 3.4 (latest reline)	35s
rake test 3.4	2m 19s
vterm-yamatanooroti 3.4	35s
rake test head (latest reline)	1m 55s
vterm-yamatanooroti head (latest reline)	38s
rake test head	1m 59s
vterm-yamatanooroti head	37s
	40m 22s

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