Return a new `w:tbl` element having *rows* rows and *cols* columns
        with *width* distributed evenly between the columns.

def new_tbl(cls, rows, cols, width):
        """
        Return a new `w:tbl` element having *rows* rows and *cols* columns
        with *width* distributed evenly between the columns.
        """
        return parse_xml(cls._tbl_xml(rows, cols, width))