pytorch

71ba76b1 - Fix building docs instructions (#64508)

Fix building docs instructions (#64508) Summary: Fixes #{64507} Removed duplicate instruction and linted the file a bit (consistent spacing around codeblocks/headers, adding code types in codeblocks, remove `$` from bash code blocks when uncecessary). Pull Request resolved: https://github.com/pytorch/pytorch/pull/64508 Reviewed By: raghuramank100 Differential Revision: D30791164 Pulled By: mrshenli fbshipit-source-id: a00db32dcfdd1ecc194c836f31174c806062eb6d