Migrate test block 113 to Dart 2.0.

tests/language_2/generic_functions_test.dart

Index: tests/language_2/generic_functions_test.dart
diff --git a/tests/language/generic_functions_test.dart b/tests/language_2/generic_functions_test.dart
similarity index 98%
rename from tests/language/generic_functions_test.dart
rename to tests/language_2/generic_functions_test.dart
index 6d22283a88bdab04a0a06a13a540a34f56a4f907..7de3b7d1c0f453ccf277c379fd69c2d93209b52e 100644
--- a/tests/language/generic_functions_test.dart
+++ b/tests/language_2/generic_functions_test.dart
@@ -101,5 +101,5 @@ main() {
 
   BinaryTree<num, num> iT = sT.map<num>((String s) => s.length);
 
-  Expect.equals(iT.foldPre<num>(0, (int i, num s) => i + s), 6);
+  Expect.equals(iT.foldPre<num>(0, (num i, num s) => i + s), 6);
 }