code: function serializeValue( value, indent, pad, space ) {
     return leftpad( JSON.stringify( value, null, indent ), pad, space );
  }
docs: Serialize an atomic value.
  Treat as JSON and pad with spaces to the specified indent.
  @private
  @param {Object} value the value to serialize
  @param {Number} [indent] the number of spaces to use for indent
  @param {Number} [pad] the initial left padding
  @param {String} [space] the character(s) to use for padding
  @return {String} the serialized JavaScript code