def textln(self, txt='<STR_LIT>'):
self.text('<STR_LIT>'.format(txt))<EOL>
Print alpha-numeric text with a newline

        The text has to be encoded in the currently selected codepage.
        The input text has to be encoded in unicode.

        :param txt: text to be printed with a newline
        :raises: :py:exc:`~escpos.exceptions.TextError`