subscript

[TimurKhay]

does SwiftString's subscript work this way intentionally?

[MaximusMcCann]

Would expect it to grab chars 4 through 8 in the below case.
currently:
"abcdefgh"[4..<8] -> "" // blank string
expected example:
"abcdefgh"[4..<8] -> "efgh"

Pull request: #22