code: def render_long_description(self, dirname):
          
          with changedir(dirname):
              self.setuptools.check_valid_package()
              long_description = self.setuptools.get_long_description()
              outfile = abspath('.long-description.html')
              self.docutils.publish_string(long_description, outfile, self.styles)
              return outfile
docs: Convert a package's long description to HTML.