* added docstrings, added some static type hints and also lint.
* added doc strings and changed some internal variable names for more clarity.
* make flake8 happy
* add descriptive docstrings and type hints in waybackpy/cdx_snapshot.py
* remove useless code and add docstrings and also lint using pylint.
* remove unwarented test
* added docstrings, lint using pylint and add a raise on 509 SC
* added docstrings and lint with pylint
* lint
* add doc strings and lint
* add docstrings and lint
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