fixup: test_main Python code fixed using ruff #5878

Job	Run time
Shellcheck	5s
Cache identify	7s
Dependency	6s
Prepare	11s
Ruff check and force	8s
Check commit	23s
Run pytest using Python 3.13	18s
Run pytest using Python 3.14	17s
Run mypy	13s
Process test coverage	14s
Process test complexity	13s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
	2m 25s

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