         let lineString2 = LineString("dog \n\n cat \n cow ")
         XCTAssertEqual(lineString2.lineNumber(at: 17), 4)
         
-        for _ in (0..<20) {
+        for _ in 0..<20 {
             let string = String(" 🐶 \n 🐱 \n 🐮 \n".shuffled())
             let lineString = LineString(string)
             

        self.string = string as NSString
    }
    
}


private class LineString: LineRangeCacheable {
    
    private(set) var string: NSString
    var lineRangeCache = LineRangeCache()
    
    
