message: Use symbol instead of Symbol
diff: @@ -89,7 +89,7 @@ function printFunction(val: Function, printFunctionName: boolean): string {
  return '[Function ' + (val.name || 'anonymous') + ']';
  }
  -function printSymbol(val: Symbol): string {
  +function printSymbol(val: symbol): string {
  return symbolToString.call(val).replace(SYMBOL_REGEXP, 'Symbol($1)');
  }
  