Reformatting module class. (#29957)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29957
Reformatting module class.
ghstack-source-id: 94058645
Test Plan: buck build xplat/caffe2/android:pytorch
Reviewed By: iseeyuan
Differential Revision: D18548185
fbshipit-source-id: 8c1f5cbf491d42915e091e6245b4f308eb162f93
