Copy edit of TorchScript Language Reference (#57694)
Summary:
Initial copy edit of the file.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57694
Reviewed By: malfet, ngimel
Differential Revision: D28289209
Pulled By: holly1238
fbshipit-source-id: 7035d6790767a2f758e6019ae63df16537ef2725
