Format all tests.

tests/isolate/message2_test.dart

Index: tests/isolate/message2_test.dart
diff --git a/tests/isolate/message2_test.dart b/tests/isolate/message2_test.dart
index 3b84e59f615804f28af1c179b390fd6e2b87b0cd..6bf10be7edd9f6bd7cf7c9bbb952a737d063b727 100644
--- a/tests/isolate/message2_test.dart
+++ b/tests/isolate/message2_test.dart
@@ -6,6 +6,7 @@
 // VMOptions=--enable_type_checks --enable_asserts
 
 library Message2Test;
+
 import 'dart:isolate';
 import 'package:unittest/unittest.dart';
 import "remote_unittest_helper.dart";
@@ -26,6 +27,7 @@ class MessageTest {
         expect(actual[key], value);
       }
     }
+
     expected.forEach(testForEachMap);
   }