[SE-0258] Fix more typos / grammaros
[SE-0258] Fix more typos / grammaros

hartbit/swift-evolution,ddunbar/swift-evolution,hartbit/swift-evolution,natecook1000/swift-evolution,anandabits/swift-evolution,Nirma/swift-evolution,apple/swift-evolution,ddunbar/swift-evolution,apple/swift-evolution,anandabits/swift-evolution,natecook1000/swift-evolution,abertelrud/swift-evolution,abertelrud/swift-evolution,Nirma/swift-evolution