Fix typos in comment
Fix typos in comment

Reviewed By: adicatana

Differential Revision: D26373834

fbshipit-source-id: 024d056ce6134d175de98d5d4107380512822810

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex