See PEP8 errors introduced in a branch

There are times when you need to see PEP8 errors only introduced in a branch, so that you can fix those and say the excuse “I didn’t introduce, those, they’re not my problem.”

This generous script lets you do that. It compares the current branch with a target branch, and shows the new ones in the current branch, and hides the ones in the target.

This requires that you use git, and pep8 should be installed.

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