Format all tests.

tests/compiler/dart2js_native/downcast_test.dart

Index: tests/compiler/dart2js_native/downcast_test.dart
diff --git a/tests/compiler/dart2js_native/downcast_test.dart b/tests/compiler/dart2js_native/downcast_test.dart
index dab6ec8901439c9fc7234511cbb64bd3fb21817b..9d5d65a1d9ac2770c0a6e5ac79c8704f115cc65c 100644
--- a/tests/compiler/dart2js_native/downcast_test.dart
+++ b/tests/compiler/dart2js_native/downcast_test.dart
@@ -18,15 +18,15 @@ abstract class I extends J {
 @Native("A")
 class A implements I {
   // The native class accepts only other native instances.
-  A read() native ;
-  write(A x) native ;
+  A read() native;
+  write(A x) native;
 }
 
 @Native("B")
 class B extends A {}
 
-makeA() native ;
-makeB() native ;
+makeA() native;
+makeB() native;
 
 void setup() native """
 // This code is all inside 'setup' and so not accesible from the global scope.