Fixed typo in torch/functional.py w/r/t broadcast_tensors (#17642)
Summary:
In reference to #17574
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17642
Differential Revision: D14297177
Pulled By: ezyang
fbshipit-source-id: 968176ea3b46a0153da0fd9e6b40db314d29e51c
