def header_proc(self, inputstring, header="file", initial="initial", use_hash=None, **kwargs):
        """Add the header."""
        pre_header = self.getheader(initial, use_hash=use_hash, polish=False)
        main_header = self.getheader(header, polish=False)
        if self.minify:
            main_header = minify(main_header)
        return pre_header + self.docstring + main_header + inputstring
Add the header.