Migrate test block 11 to Dart 2.0.

tests/corelib_2/iterable_mapping_test.dart

Index: tests/corelib_2/iterable_mapping_test.dart
diff --git a/tests/corelib_strong/iterable_mapping_test.dart b/tests/corelib_2/iterable_mapping_test.dart
similarity index 85%
rename from tests/corelib_strong/iterable_mapping_test.dart
rename to tests/corelib_2/iterable_mapping_test.dart
index 0d5997542ff599abaec99d180af68a1ed9167720..4f06c2c402abff2003e9a99ea5def88f1db36b5f 100644
--- a/tests/corelib_strong/iterable_mapping_test.dart
+++ b/tests/corelib_2/iterable_mapping_test.dart
@@ -24,11 +24,11 @@ main() {
   mapped = mapped.map((x) => x + 1);
   Expect.listEquals([6, 7], mapped.toList());
 
-  mapped = list3.map((x) => x + 1);
-  Expect.listEquals([], mapped.toList());
+  mapped = list3.map((x) => x + 1); //# 01: compile-time error
+  Expect.listEquals([], mapped.toList()); //# 01: continued
 
-  mapped = mapped.map((x) => x + 1);
-  Expect.listEquals([], mapped.toList());
+  mapped = mapped.map((x) => x + 1); //# 01: continued
+  Expect.listEquals([], mapped.toList()); //# 01: continued
 
   var expected = new Set<int>()..addAll([12, 13, 14]);
   mapped = set1.map((x) => x + 1);