fix(doctests): fix 3 doctest failures breaking CI #258

Job	Run time
format/nightly	27s
clippy/1.94.1	40s
Pass MSRV values to other jobs	2s
cross_test/s390x-unknown-linux-gnu/stable	1m 51s
nostd/thumbv6m-none-eabi/stable	32s
native-backend/stable	7m 55s
cross_test/i686-unknown-linux-gnu/stable	1m 35s
docs/nightly	0s
miri	0s
cargo-careful	0s
blas-msrv	56s
tests/beta	11m 35s
tests/1.94.0	11m 20s
tests/stable	10m 46s
conclusion	-1s
cross_test/i686-unknown-linux-gnu/stable	1m 41s
nostd/thumbv6m-none-eabi/stable	32s
docs/nightly	-225964s
miri	-225964s
format/nightly	27s
blas-msrv	56s
tests/stable	10m 46s
tests/1.94.0	11m 20s
tests/beta	11m 35s
clippy/1.94.1	40s
native-backend/stable	7m 55s
Pass MSRV values to other jobs	2s
cross_test/s390x-unknown-linux-gnu/stable	1m 51s
cargo-careful	-225973s
conclusion	-1s
	-672179s

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