Apply suggestions from code review #2485

Job	Run time
Bitrot check	4m 12s
Build target wasm32-wasi	4m 21s
Test on ubuntu-latest	13m 8s
Latest build on ubuntu-latest	1m 59s
Test on ubuntu-latest with --features orchard	13m 34s
Clippy (MSRV)	4m 28s
Latest build on windows-latest	4m 28s
Clippy (beta)	11s
Test on ubuntu-latest with --features unstable-nu6	12m 53s
Latest build on macOS-latest	5m 54s
Test on ubuntu-latest with --features zfuture	13m 25s
Test on windows-latest	17m 33s
Code coverage	20m 44s
Intra-doc links	5m 9s
Test on windows-latest with --features orchard	17m 25s
Rustfmt	13s
Test on windows-latest with --features unstable-nu6	17m 41s
protobuf consistency	4m 12s
Test on windows-latest with --features zfuture	17m 13s
UUID validity	3s
Test on macOS-latest	23m 49s
Test on macOS-latest with --features orchard	30m 38s
	3h 53m 13s

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