# File lib/html/pipeline/emoji_filter.rb, line 16
      def call
        doc.search('.//text()').each do |node|
          content = node.text
          next unless content.include?(':')
          next if has_ancestor?(node, ignored_ancestor_tags)
          html = emoji_image_filter(content)
          next if html == content
          node.replace(html)
        end
        doc
      end