Use lower case for strong wolfe option. (#22092)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22092
ghimport-source-id: ccc53ed2f1e16865237334a4dde4d162e21762e5
Test Plan: Imported from OSS
Differential Revision: D15955996
Pulled By: vincentqb
fbshipit-source-id: 8ffbea3b9ef8ff7021d42524fa46112da8a3438e
