text: const self = {
      name: 'headers.hr',
      section: 'front-matter',
      rule: 'hrAfterCopyright',
  };
  
  exports.name = self.name;
  
  exports.check = function (sr, done) {
      const hasHrLastChild =
          sr.jsDocument.querySelectorAll('body div.head > hr:last-child')
              .length === 1;
      const hasHrNextSibling =
          sr.jsDocument.querySelectorAll('body div.head + hr').length === 1;
      if (hasHrLastChild && hasHrNextSibling) {
          sr.error(self, 'duplicate');
      } else if (!hasHrLastChild && !hasHrNextSibling) {
          sr.error(self, 'not-found');
      }
      done();
  };
  