clearLine function
void
clearLine()
Clears the current line, and goes back to the start of the line.
Implementation
void clearLine() {
// // \r^[[2K\r
stdout.add([$esc, $lbracket, $2, $k, $cr]);
// stdout.write('\r');
// for (int i = 0; i < stdout.terminalColumns; i++) stdout.write(' ');
// stdout.write('\r');
}