general cleanup

General cleanup Removed unused imports, ensure spacing is correct, use f-strings (every distro this project lands on should be at >=python3.6).

Ensure docstrings use the same formatting, ie whether to include a space between """ or to end each docstring with a period (aka full stop). This is pretty trivial and highly subjective. I'm likely a bit OCD to be honest. I just chose a consistent format and went with it, feel free to reject anything you want.