docs: function (expr, length, fillChar) {
    fillChar = fillChar || ' ';
    var string = '' + expr;
    var totalPad = length - string.length;
    if (string.length > length) {
      return center(string, length);
    } else {
      //if (totalPad > 0) {
        var leftPad = string.length + Math.floor(totalPad / 2);
        string = lpad(string, leftPad, fillChar);
        string = rpad(string, length, fillChar);
      //}
    }
    return string;
  }