Print the start message with or without newline depending on the
        self._start_no_nl variable.

def _start_print(self):
        """Print the start message with or without newline depending on the
        self._start_no_nl variable.
        """
        if self._start_no_nl:
            sys.stdout.write(self._start_msg)
            sys.stdout.flush()
        else:
            print(self._start_msg)