Minor spelling updates (#52149)
Summary:
Add space between 'e.g.' and 'build'
'pacakge'->'package'
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52149
Reviewed By: osalpekar
Differential Revision: D26405824
Pulled By: malfet
fbshipit-source-id: 386390d3f31a9fc268b05902b9dca1deeaf626f9
