code: def add_chapter(self, title):
          '''
          Adds a new chapter to the report.
  
          :param str title: Title of the chapter.
          '''
          chap_id = 'chap%s' % self.chap_counter
          self.chap_counter += 1
          self.sidebar += '<a href="#%s" class="list-group-item">%s</a>\n' % (
              chap_id, title)
          self.body += '<h1 id="%s">%s</h1>\n' % (chap_id, titlef add_chapter(self, title):
          '''
          Adds a new chapter to the report.
  
          :param str title: Title of the chapter.
          '''
          chap_id = 'chap%s' % self.chap_counter
          self.chap_counter += 1
          self.sidebar += '<a href="#%s" class="list-group-item">%s</a>\n' % (
              chap_id, title)
          self.body += '<h1 id="%s">%s</h1>\n' % (chap_id, title)
docs: Adds a new chapter to the report.
  
          :param str title: Title of the chapter.