Apply suggestions from code review #2524

Job	Run time
Build target wasm32-wasi	3m 57s
Bitrot check	4m 22s
Clippy (MSRV)	4m 43s
Latest build on ubuntu-latest	1m 46s
Test on ubuntu-latest	13m 30s
Test on ubuntu-latest with --features orchard	13m 23s
Latest build on windows-latest	3m 51s
Test on ubuntu-latest with --features unstable-nu6	13m 5s
Clippy (beta)	16s
Latest build on macOS-latest	2m 57s
Test on ubuntu-latest with --features zfuture	13m 9s
Test on windows-latest	17m 32s
Code coverage	21m 16s
Test on windows-latest with --features orchard	17m 50s
Intra-doc links	5m 11s
Test on windows-latest with --features unstable-nu6	18m 35s
Rustfmt	15s
Test on windows-latest with --features zfuture	18m 2s
protobuf consistency	4m 31s
Test on macOS-latest	25m 8s
Test on macOS-latest with --features orchard	31m 53s
UUID validity	6s
	3h 55m 18s

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