You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gollum_tags_filter.rb
    path of file: ./repos/gitlabhq/lib/banzai/filter
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Banzai
  module Filter
    # HTML Filter for parsing Gollum's tags in HTML. It's only parses the
    # following tags:
    #
    # - Link to internal pages:
    #
    #   * [[Bug Reports]]
    #   * [[How 
    
      def call
        doc.xpath('descendant-or-self::text()').each do |node|
          next if has_ancestor?(node, IGNORED_ANCESTOR_TAGS)
          next unless node.content =~ TAGS_PATTERN

          html = process_tag(Regexp.last_match(1))

          node.replace(html) if html && html != node.content
        end

        doc
      end