some more minor improvements #418

Job	Run time
Check Documentation Build	31s
Run Tests	1m 49s
Check Cross-Compilation (thumbv7em-none-eabihf)	27s
Check build (ubuntu-latest)	1m 9s
Check formatting	6s
Check Cross-Compilation (armv7-unknown-linux-gnueabihf)	24s
Check build (windows-latest)	2m 13s
Check build (macos-latest)	1m 29s
Clippy	1m 8s
	9m 16s

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