Fix test failures in nom_recipes doc tests (#1772) #1074

Job	Run time
Build documentation	54s
Test minimal rust version	4m 39s
Bench	3m 7s
Test (stable)	1m 3s
Test (beta)	3m 9s
Test (nightly)	48s
Coverage	5m 25s
Test (1.65.0)	5m 28s
Check formatting	11s
Test (stable, --features "std")	49s
Test (stable, --no-default-features)	2m 56s
Test (stable, --no-default-features --features "alloc")	47s
Test (nightly, --no-default-features)	2m 58s
Test (nightly, --no-default-features --features "alloc")	47s
	33m 1s

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