Trailing comma bear

[jayvdb]

https://www.python.org/dev/peps/pep-0008/?#when-to-use-trailing-commas

https://pypi.org/project/flake8-commas/ and https://pypi.org/project/add-trailing-comma/

[ajeetdsouza]

Won't this work anyway when using flake8-commas as a plugin for flake8 itself?