Add some code comments #486

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Job	Run time
Check	29s
Clippy	43s
Rustfmt	3s
MSRV	37s
spellcheck	10s
Test Suite (ubuntu-24.04, stable, clang-cl)	2m 48s
Test Suite (ubuntu-24.04, stable, clang)	2m 54s
Test Suite (ubuntu-24.04, nightly, clang-cl)	3m 39s
Test Suite (ubuntu-24.04, nightly, clang)	2m 11s
Test Suite (macos-latest, stable, clang-cl)	3m 12s
Test Suite (macos-latest, stable, clang)	2m 31s
Test Suite (macos-latest, nightly, clang-cl)	3m 45s
Test Suite (macos-latest, nightly, clang)	2m 13s
Test Suite (windows-latest, stable, clang-cl)	7m 23s
Test Suite (windows-latest, stable, clang)	4m 51s
Test Suite (windows-latest, nightly, clang-cl)	4m 50s
Test Suite (windows-latest, nightly, clang)	6m 31s
	48m 50s

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