Fixes for clippy 1.76. #936

Job	Run time
Rustfmt	19s
Check (ubuntu-latest, stable)	1m 38s
Test Suite (ubuntu-latest, stable)	1m 52s
Clippy	1m 37s
Check (ubuntu-latest, nightly)	2m 3s
Test Suite (ubuntu-latest, nightly)	2m 0s
Check (windows-2019, stable)	2m 43s
Test Suite (macOS-latest, stable)	2m 16s
Test Suite (macOS-latest, nightly)	2m 36s
Check (windows-2019, nightly)	2m 52s
Check (macOS-latest, stable)	2m 11s
Check (macOS-latest, nightly)	3m 54s
	26m 1s

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