appendln
fun StringBuilder.appendln(it: String): StringBuilder
fun StringBuilder.appendln(it: Boolean): StringBuilder
fun StringBuilder.appendln(it: Byte): StringBuilder
fun StringBuilder.appendln(it: Short): StringBuilder
fun StringBuilder.appendln(it: Int): StringBuilder
fun StringBuilder.appendln(it: Long): StringBuilder
fun StringBuilder.appendln(it: Float): StringBuilder
fun StringBuilder.appendln(it: Double): StringBuilder
fun StringBuilder.appendln(it: Any?): StringBuilder
fun StringBuilder.appendln(): StringBuilder