DOC: correct docstring for torch and torch.Tensor package (#16842)
Summary:
This PR is a simple fix for the mistake in the "tensor" and "torch.Tensor"doc.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16842
Differential Revision: D14020300
Pulled By: ezyang
fbshipit-source-id: 3ab04f1223d6e60f8da578d04d759e385d23acbb
