Revert "fix typos (#740)"
Revert "fix typos (#740)"

This reverts commit 24b0150bbf40b30e0cc62c2df0c19f47ef6c4ba5.

ddunbar/swift-evolution,ddunbar/swift-evolution,rballard/swift-evolution,bolshedvorsky/swift-evolution,abertelrud/swift-evolution,allevato/swift-evolution,jckarter/swift-evolution,abertelrud/swift-evolution,Nirma/swift-evolution,hartbit/swift-evolution,rballard/swift-evolution,aciidb0mb3r/swift-evolution,apple/swift-evolution,allevato/swift-evolution,natecook1000/swift-evolution,bolshedvorsky/swift-evolution,airspeedswift/swift-evolution,jckarter/swift-evolution,apple/swift-evolution,DevAndArtist/swift-evolution,natecook1000/swift-evolution,DevAndArtist/swift-evolution,jtbandes/swift-evolution,hartbit/swift-evolution,Nirma/swift-evolution,anandabits/swift-evolution,airspeedswift/swift-evolution,anandabits/swift-evolution,aciidb0mb3r/swift-evolution,jtbandes/swift-evolution