'Handle the lines that are not part of any special state. Look for an
opening bracket. If an open bracket is found, add this line to a
temporary self.__previous line, which other methods need. Otherwise,
print out the line.
Required:
self, line
Returns:
Nothing'

def __default_func(self, line):

    if (self.__token_info == 'ob<nu<open-brack'):
        self.__state = 'after_ob'
        self.__previous_line = line
    else:
        self.__write_obj.write(line)
