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: test_cgi_util.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/cgi
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'test/unit'
require 'cgi'
require 'stringio
    
  def teardown
    CGI::Escape.module_eval do
      alias escapeHTML _escapeHTML
      remove_method :_escapeHTML
      alias unescapeHTML _unescapeHTML
      remove_method :_unescapeHTML
    end
  end