Format all tests.

tests/language/field_optimization_test.dart

Index: tests/language/field_optimization_test.dart
diff --git a/tests/language/field_optimization_test.dart b/tests/language/field_optimization_test.dart
index 1d1ba3c87f2c4d41178d73d2e849c8463325942e..58a1461c64704b0ee6bd6b627e930d0225e661dc 100644
--- a/tests/language/field_optimization_test.dart
+++ b/tests/language/field_optimization_test.dart
@@ -6,16 +6,17 @@ import "package:expect/expect.dart";
 
 // Dart test program to test type-based optimization on fields.
 
-
 class A {
   var x;
   A() : x = 0;
   foo() {
     x++;
   }
+
   toto() {
     x = 99;
   }
+
   bar(y) {
     x = y;
   }
@@ -24,6 +25,7 @@ class A {
 class B {
   operator +(other) => "ok";
 }
+
 main() {
   var a = new A();
   a.foo();