which is better?

/**
 * Copyright 0xABCDEF ( http://wonderfl.net/user/0xABCDEF )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/xmUL
 */

package {
    import flash.text.TextFieldAutoSize;
    import flash.text.TextField;
    import flash.display.Sprite;
    public class LineAlignment extends Sprite {
        public function LineAlignment() {
            var a:String = "which\n"+
            "is\n"+
            "better?";
            var b:String = "which\n\
is\n\
better?";
            var logField:TextField = addChild( new TextField ) as TextField;
            logField.autoSize = TextFieldAutoSize.LEFT;
            logField.text = "a :\n"+a+"\n\nb :\n"+b;
        }
    }
}