Fix typos ("and and" -> "and")
Fix typos ("and and" -> "and")

Reviewed By: yfeldblum

Differential Revision: D7091797

fbshipit-source-id: cbba7e5c17e1b6d4446570fb7a2b888db8bcd17e

facebook/folly,rklabs/folly,facebook/folly,rklabs/folly,facebook/folly,facebook/folly,rklabs/folly,facebook/folly,rklabs/folly,rklabs/folly