Fix partition on empty arrays (#1502) #445

Job	Run time
clippy/stable	30s
nostd/thumbv6m-none-eabi/stable	11s
Pass MSRV values to other jobs	3s
cross_test/s390x-unknown-linux-gnu/stable	8m 44s
cross_test/i686-unknown-linux-gnu/stable	1m 30s
cargo-careful	2m 11s
docs/nightly	20s
format/nightly	12s
miri	8m 25s
blas-msrv	35s
tests/nightly	3m 20s
tests/beta	3m 5s
tests/stable	2m 36s
tests/1.64.0	3m 57s
conclusion	2s
	35m 41s

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