disable autograd while preparing Tensor for printing (#39420)
Summary:
Minor speed up when printing.
Also allows you to print Tensors that you cannot perform autograd ops on.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39420
Differential Revision: D21889390
Pulled By: albanD
fbshipit-source-id: 4e229994eb89484795282e6eac37359ce46b5ebc
