Fix a typo

Created by: adyouri

requested review from @root

requested review from @root

requested review from @root

requested review from @root

requested review from @root

requested review from @root

requested review from @root

requested review from @root

Created by: facebook-github-bot

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added CLA Signed label

Created by: facebook-github-bot

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

Merged by: amyrlam at 2019-02-21 16:41:31 UTC

closed

changed milestone to %2.1.6

added tag: documentation label