Migrate test block 113 to Dart 2.0.

tests/language_2/generic_async_star_test.dart

Index: tests/language_2/generic_async_star_test.dart
diff --git a/tests/language_strong/generic_async_star_test.dart b/tests/language_2/generic_async_star_test.dart
similarity index 81%
rename from tests/language_strong/generic_async_star_test.dart
rename to tests/language_2/generic_async_star_test.dart
index cf18af84924948a71e6e6420322cdd082319b6b7..da88b9a0e1816fd9498f256af3aec89805a895b5 100644
--- a/tests/language_strong/generic_async_star_test.dart
+++ b/tests/language_2/generic_async_star_test.dart
@@ -6,14 +6,14 @@ import "package:expect/expect.dart";
 
 import 'dart:async';
 
-Stream/*<T>*/ foo/*<T>*/(/*=T*/ x) async* {
+Stream<T> foo<T>(T x) async* {
   for (int i = 0; i < 3; i++) {
     yield x;
   }
 }
 
 main() async {
-  await for (var x in foo/*<int>*/(1)) {
+  await for (var x in foo<int>(1)) {
     Expect.equals(1, x);
   }
 }