Migrate the language tests up to arithmetic_test.

tests/language_2/abstract_factory_constructor_test.dart

Index: tests/language_2/abstract_factory_constructor_test.dart
diff --git a/tests/language/abstract_factory_constructor_test.dart b/tests/language_2/abstract_factory_constructor_test.dart
similarity index 87%
rename from tests/language/abstract_factory_constructor_test.dart
rename to tests/language_2/abstract_factory_constructor_test.dart
index e6104949cec29453ae6107fdd2c3ee9813a5563f..90713ca04fe031ea8fe4401a11f15bbee2042380 100644
--- a/tests/language/abstract_factory_constructor_test.dart
+++ b/tests/language_2/abstract_factory_constructor_test.dart
@@ -21,11 +21,11 @@ abstract class A1 {
 
 class A2 {
   // Intentionally abstract method.
-  method(); // //# 00: static type warning
+  method(); //# 00: compile-time error
   A2.make() {}
 }
 
 main() {
   new A1.make();
-  new A2.make();              //# 00: continued
+  new A2.make(); //# 00: continued
 }