code: function unescape (line) {
    var retv = _.replace(line, propEscapeRE, '$1');
    retv = _.replace(line, unicodeEscapeRE, function (m) {
      return String.fromCharCode(parseInt(m, 16));
    });
    if (retv !== line) {
      debug('removed escapes from: %s => %s', line, retv);
    }
    return retv;
  }
docs: Resolve property esacpe sequences in a line.
  Also resolves unicode escapes.
  
  @param {string} line
  @returns {string}