reformat caffe2/torch/ao/quantization/quantize.py (pytorch#103823)

Summary:
Pull Request resolved: pytorch#103823

at, otherwise hard to compare changes in the following diffs after reformatting

Test Plan:
black caffe2/torch/ao/quantization/quantize.py

tests

Differential Revision: D46825187

fbshipit-source-id: 2dd109d9111e722f4791a4698a70342fcaafc9c3

Author: strisunshinewentingwang