[swift] highlighting issue after return statement

[vincentwoo]

(Now that Swift is OSS, I'm starting to play with it in CodeMirror)

Placing the following into https://codemirror.net/mode/swift/index.html shows that highlighting doesn't seem to understand the string following return is a string.

func greet(name: String, day: String) -> String {
    print("Hello \(name), today is \(day).")
}

func greet(name: String, day: String) -> String {
    return "Hello \(name), today is \(day)."
}