code: def copyright_holder_json(soup):
      "for json output add a full stop if ends in et al"
      holder = None
      permissions_tag = raw_parser.article_permissions(soup)
      if permissions_tag:
          holder = node_text(raw_parser.copyright_holder(permissions_tag))
      if holder is not None and holder.endswith('et al'):
          holder = holder + '.'
      return holdef copyright_holder_json(soup):
      "for json output add a full stop if ends in et al"
      holder = None
      permissions_tag = raw_parser.article_permissions(soup)
      if permissions_tag:
          holder = node_text(raw_parser.copyright_holder(permissions_tag))
      if holder is not None and holder.endswith('et al'):
          holder = holder + '.'
      return holder
docs: for json output add a full stop if ends in et al