Fixed behavior of div_factor parameter in optim.lr_scheduler.OneCycleLR (#28217)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/28216
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28217
Differential Revision: D18070759
Pulled By: vincentqb
fbshipit-source-id: ed032190c0e3eab834fc9a8f408b75b56f0f35ec
