def format_description(self):
        """format and return the description, supplemental guidance and statements as a markdown string"""
        fulldesc = self.description
        if len(self.statements) > 0:
            fulldesc += "\n\n"
            for statement in self.statements:
                fulldesc += f"* **{statement.external_id}** {statement.description}\n"
                for substatement in statement.substatements:
                    fulldesc += f"    * **{substatement.external_id}** {substatement.description}\n"
        if self.supplemental:
            fulldesc += "\n" + self.supplemental
        return fulldesc
format and return the description, supplemental guidance and statements as a markdown string
src/parse_r4_controls.py