showdown/src/subParsers/unescapeSpecialChars.js

/**
 * Swap back in all the special characters we've hidden.
 */
showdown.subParser('unescapeSpecialChars', function (text, options, globals) {
  'use strict';
  text = globals.converter._dispatch('unescapeSpecialChars.before', text, options, globals);

  text = text.replace(/¨E(\d+)E/g, function (wholeMatch, m1) {
    var charCodeToReplace = parseInt(m1);
    return String.fromCharCode(charCodeToReplace);
  });

  text = globals.converter._dispatch('unescapeSpecialChars.after', text, options, globals);
  return text;
});