busybox/shell/ash_test/ash-signals/usage.right

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trap -- 'a' EXIT
trap -- 'a' INT
trap -- 'a' USR1
trap -- 'a' USR2
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trap -- 'a' EXIT trap -- 'a' INT trap -- 'a' USR1 trap -- 'a' USR2
___
trap -- 'a' EXIT
trap -- 'a' INT
trap -- 'a' USR1
trap -- 'a' USR2
___
trap -- 'a' EXIT
trap -- 'a' INT
trap -- 'a' USR1
trap -- 'a' USR2
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___
trap -- 'a' USR1
trap -- 'a' USR2
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trap -- 'a' USR2