Disable formatting and add new-lines to make tests faster.

test/dart_codegen/expect/core/null.dart

Index: test/dart_codegen/expect/core/null.dart
diff --git a/test/dart_codegen/expect/core/null.dart b/test/dart_codegen/expect/core/null.dart
index 5f949fc4df035369d0e4abcb46734917c693367b..e6163b463a2782a5cca9847d8a5b6c0fdcd3a056 100644
--- a/test/dart_codegen/expect/core/null.dart
+++ b/test/dart_codegen/expect/core/null.dart
@@ -1,8 +1,6 @@
 part of dart.core;
-
-class Null {
-  factory Null._uninstantiable() {
-    throw new UnsupportedError('class Null cannot be instantiated');
+ class Null {factory Null._uninstantiable() {
+  throw new UnsupportedError('class Null cannot be instantiated');
   }
-  String toString() => "null";
+ String toString() => "null";
 }