Enable flake8-bugbear line length checking. (#18138)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18138
ghimport-source-id: be62a71ef98714e6f168a00f84120f612363528e
Stack from [ghstack](https://github.com/ezyang/ghstack):
* **#18138 Enable flake8-bugbear line length checking.**
flake8-bugbear's line length checker (B950) which permits violations
of up to 10% but specifies the "true" limit when you go over.
I had to ignore a bunch of flake8-bugbear's other checks when I
turned this on. They're good checks though (they're turned on
in fbcode) and we should fix them eventually.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Reviewed By: salexspb
Differential Revision: D14508678
fbshipit-source-id: 2610ecc0dd43cc0788d77f4d024ebd85b26b8d41
