Format all tests.

tests/language/field_optimization2_test.dart

Index: tests/language/field_optimization2_test.dart
diff --git a/tests/language/field_optimization2_test.dart b/tests/language/field_optimization2_test.dart
index 870d4edc0668ed9ac24969dc3db7ce24f0785b03..d0ee6bd986bb060492a63eb8d5959f183a2c0eb1 100644
--- a/tests/language/field_optimization2_test.dart
+++ b/tests/language/field_optimization2_test.dart
@@ -6,7 +6,6 @@ import "package:expect/expect.dart";
 
 // Dart test program to test type-based optimization on fields.
 
-
 class A {
   var x;
   A() : x = new B();
@@ -18,6 +17,7 @@ class A {
 class B {
   operator +(other) => 498;
 }
+
 main() {
   var a = new A();
   a.foo();