Test

provide Board::{is_empty,first,last} #347

Job	Run time
check_no_std	22s
check_fuzz	22s
bench	33s
test (1.75.0)	39s
test (1.75.0, --features variant)	41s
test (1.75.0, --features alloc)	37s
test (1.75.0, --features std)	39s
test (1.75.0, --features alloc,variant)	39s
test (1.75.0, --features std,variant)	40s
test (1.75.0, --features nohash-hasher,variant)	38s
test (stable)	33s
test (stable, --features variant)	33s
test (stable, --features alloc)	33s
test (stable, --features std)	33s
test (stable, --features alloc,variant)	38s
test (stable, --features std,variant)	35s
test (stable, --features nohash-hasher,variant)	35s
test (nightly)	34s
test (nightly, --features variant)	35s
test (nightly, --features alloc)	33s
test (nightly, --features std)	34s
test (nightly, --features alloc,variant)	36s
test (nightly, --features std,variant)	35s
test (nightly, --features nohash-hasher,variant)	38s
test (nightly, -Z minimal-versions --all-features)	38s
	14m 33s

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