Run dartfmt on all files under runtime.

runtime/observatory/tests/service/vm_test.dart

Index: runtime/observatory/tests/service/vm_test.dart
diff --git a/runtime/observatory/tests/service/vm_test.dart b/runtime/observatory/tests/service/vm_test.dart
index eedf6ae53a63ee46e88791d0351142fbaaa1e00f..f39465e0a2ba661389b72512be3df7cdc46471e4 100644
--- a/runtime/observatory/tests/service/vm_test.dart
+++ b/runtime/observatory/tests/service/vm_test.dart
@@ -8,14 +8,11 @@ import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 var tests = [
-
-(Isolate isolate) {
-  VM vm = isolate.owner;
-  expect(vm.targetCPU, isNotNull);
-  expect(vm.architectureBits == 32 ||
-         vm.architectureBits == 64, isTrue);
-},
-
+  (Isolate isolate) {
+    VM vm = isolate.owner;
+    expect(vm.targetCPU, isNotNull);
+    expect(vm.architectureBits == 32 || vm.architectureBits == 64, isTrue);
+  },
 ];
 
 main(args) => runIsolateTests(args, tests);