code: def make_article_info_copyright(self, article_info_div):
          
          perm = self.article.root.xpath('./front/article-meta/permissions')
          if not perm:
              return
          copyright_div = etree.SubElement(article_info_div, 'div', {'id': 'copyright'})
          cp_bold = etree.SubElement(copyright_div, 'b')
          cp_bold.text = 'Copyright: '
          copyright_string = '\u00A9 '
          copyright_holder = perm[0].find('copyright-holder')
          if copyright_holder is not None:
              copyright_string += all_text(copyright_holder) + '. '
          lic = perm[0].find('license')
          if lic is not None:
              copyright_string += all_text(lic.find('license-p'))
          append_new_text(copyright_div, copyright_string)
docs: Makes the copyright section for the ArticleInfo. For PLoS, this means
          handling the information contained in the metadata <permissions>
          element.