pytorch

ea5c9c92 - Update installing.rst (#20354)

Update installing.rst (#20354) Summary: Delete useless `cd` Pull Request resolved: https://github.com/pytorch/pytorch/pull/20354 Differential Revision: D15296154 Pulled By: soumith fbshipit-source-id: 2042b56c91b33e302b0ed9c77f29b9b64079fa98