Migrate language/arithmetic2_test ... language/async_await_syntax_test.

tests/language_2/assertion_test.dart

Index: tests/language_2/assertion_test.dart
diff --git a/tests/language_strong/assertion_test.dart b/tests/language_2/assertion_test.dart
similarity index 98%
rename from tests/language_strong/assertion_test.dart
rename to tests/language_2/assertion_test.dart
index d1cc39b142c9a553e67c8310fe0a58151575c54b..462bd2457ab0527577bd688516e227d08765a25d 100644
--- a/tests/language_strong/assertion_test.dart
+++ b/tests/language_2/assertion_test.dart
@@ -1,8 +1,8 @@
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// VMOptions=--enable_type_checks
-//
+// VMOptions=--enable_type_checks --enable_asserts
+
 // Dart test program testing assert statements.
 
 import "package:expect/expect.dart";