Typos and corrections for troubleshooting docs
Typos and corrections for troubleshooting docs

Summary: Pull Request resolved: https://github.com/facebook/flipper/pull/390

Reviewed By: danielbuechele

Differential Revision: D14342222

Pulled By: passy

fbshipit-source-id: 10509d3738a02136b378f6694c721fc72f0aeef0

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