collected_pulses(): don't return None's at rollover #1143

Job	Run time
Shellcheck	4s
Prepare	45s
Dependency	3s
Ruff check and force	5s
Check commit	44s
Create pytest cache for Python 3.12	7s
Create pytest cache for Python 3.11	9s
Run pytest using Python 3.11	18s
Run pytest using Python 3.12	18s
Process test coverage	-1s
Build and publish Python 🐍 distributions 📦 to TestPyPI	-1s
Process test complexity	-1s
Run mypy	-1s
	2m 29s

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