def _clean_metadata(self):
        """
        the long description doesn't load properly (gets unwanted indents),
        so fix it.
        """
        desc = self.metadata.get_long_description()
        if not isinstance(desc, six.text_type):
            desc = desc.decode('utf-8')
        lines = io.StringIO(desc)

        def trim_eight_spaces(line):
            if line.startswith(' ' * 8):
                line = line[8:]
            return line
        lines = itertools.chain(
            itertools.islice(lines, 1),
            six.moves.map(trim_eight_spaces, lines),
        )
        self.metadata.long_description = ''.join(lines)
the long description doesn't load properly (gets unwanted indents),
        so fix it.