old_contents: 'use strict';
  
  /**
   * Dependencies.
   */
  
  var Interface;
  
  Interface = require('datamap-interface');
  
  /**
   * Data.
   */
  
  var words;
  
  words = require('./data/iso-639-2.json');
  
  /**
   * Expose iso-639-2.
   */
  
  module.exports = new Interface(words);
  
new_contents: 'use strict';
  
  /**
   * Dependencies.
   */
  
  var Interface;
  
  Interface = require('datamap-interface');
  
  /**
   * Data.
   */
  
  var codes;
  
  codes = require('./data/iso-639-2.json');
  
  /**
   * Expose iso-639-2.
   */
  
  module.exports = new Interface(codes);
  
subject: Refactor `index.js`