`with_prev` #536

Job	Run time
check format	15s
test	1m 21s
check	16s
msrv	1m 19s
check (--no-default-features)	19s
check (--no-default-features --features use_alloc)	23s
check (--all-targets --all-features)	40s
All checks succeeded	3s
	4m 36s

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