fixup: show_channel Python code fixed using Ruff #3192

Job	Run time
Cache identify	7s
Shellcheck	4s
Dependency	5s
Prepare	8s
Ruff check and force	12s
Run pytest using Python ${{ matrix.python-version }}	0s
Check commit	0s
Run mypy	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test complexity	0s
Process test coverage	0s
	36s

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