* Ignore entire __pycache__ folder instead of individual *.pyc files
* Rewrite the yaml loader to match PyYAML
The old implementation would fail in weird ways with configs that were
incorrect in just the right way. The new implementation just does what
PyYAML would do, only diverging in case of duplicate keys.
* Clarify duplicate yaml key ValueError message
Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>
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Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>