Rust

Con about writing impl sections #640

Job	Run time
build-i686	1m 11s
lint	28s
miri	2m 2s
build (stable, --all-features)	39s
build (1.85.0, --all-features)	39s
build (stable)	35s
build (nightly, --no-default-features --features 'derive')	37s
build (stable, --no-default-features --features 'derive')	36s
build (nightly)	33s
build (nightly, --all-features)	33s
build (1.85.0)	36s
build (beta)	34s
build (1.85.0, --no-default-features --features 'derive')	38s
build (beta, --no-default-features --features 'derive')	37s
build (beta, --all-features)	36s
coverage	49s
	11m 43s

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