Fix last_name edge cases with Solady library #2272

Job	Run time
tests (ubuntu-latest, unit, 3.8)	53s
tests (ubuntu-latest, unit, 3.12)	1m 1s
tests (ubuntu-latest, integration, 3.8)	3m 6s
tests (ubuntu-latest, integration, 3.12)	3m 18s
tests (ubuntu-latest, tool, 3.8)	56s
tests (ubuntu-latest, tool, 3.12)	45s
tests (windows-2022, unit, 3.8)	1m 54s
tests (windows-2022, unit, 3.12)	2m 10s
tests (windows-2022, integration, 3.8)	4m 7s
tests (windows-2022, integration, 3.12)	3m 4s
tests (windows-2022, tool, 3.8)	4m 25s
tests (windows-2022, tool, 3.12)	3m 24s
coverage	23s
	29m 26s

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