def decode(cls, line):
        """
        Remove backslash escaping from line.value.
        """
        if line.encoded:
            encoding = getattr(line, 'encoding_param', None)
            if encoding and encoding.upper() == cls.base64string:
                line.value = codecs.decode(self.value.encode("utf-8"), "base64").decode(encoding)
            else:
                line.value = stringToTextValues(line.value)[0]
            line.encoded=False
Remove backslash escaping from line.value.