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set -- '';
recho "${@}" x
recho "${@:1}" x
set -- "${@:1}"
echo "$#"
set -- '' ''
recho "${@:1}" x
recho "${@:1:1}" x
typeset -a A # ksh93 needs this
A=('' '')
recho "${A[@]:0}" x
recho "${A[@]:0:1}" x
recho "${A[@]:1}" x
set -- ''
recho "${@/foo/bar}"
recho "${@^^[abcde]}"
A=( '' )
recho "${A[@]/foo/bar}"
recho "${A[@],,[abcde]}"
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