format for readability (#42851)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/42851
Test Plan: Imported from OSS
Reviewed By: smessmer
Differential Revision: D23048382
Pulled By: bhosmer
fbshipit-source-id: 55d84d5f9c69be089056bf3e3734c1b1581dc127
