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: to_label.rb
    path of file: ./repos/ruby/lib/rdoc/markup
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'cgi/util'

##
# Creates HTML-safe labels suitable for use in id attributes.  Tidylinks are
# converted to their link part and cross-reference links have the suppression
# 
    
  def initialize markup = nil
    super nil, markup

    @markup.add_regexp_handling RDoc::CrossReference::CROSSREF_REGEXP, :CROSSREF
    @markup.add_regexp_handling(/(((\{.*?\})|\b\S+?)\[\S+?\])/, :TIDYLINK)

    add_tag :BOLD, '', ''
    add_tag :TT,   '', ''
    add_tag :EM,   '', ''

    @res = []
  end