Run dartfmt on all files under runtime.

runtime/observatory/tests/service/caching_test.dart

Index: runtime/observatory/tests/service/caching_test.dart
diff --git a/runtime/observatory/tests/service/caching_test.dart b/runtime/observatory/tests/service/caching_test.dart
index 6194ba65f7e1f1a6eee96a46292cdf3241e81ee8..a95dd3d67ee471412189958e4956c7282338b9e0 100644
--- a/runtime/observatory/tests/service/caching_test.dart
+++ b/runtime/observatory/tests/service/caching_test.dart
@@ -14,13 +14,12 @@ import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 var tests = [
-(Isolate isolate) async {
-  Library lib = await isolate.rootLibrary.load();
-  Script script = await lib.scripts.single.load();
-  Script script2 = await isolate.getObject(script.id);
-  expect(identical(script, script2), isTrue);
-},
-
+  (Isolate isolate) async {
+    Library lib = await isolate.rootLibrary.load();
+    Script script = await lib.scripts.single.load();
+    Script script2 = await isolate.getObject(script.id);
+    expect(identical(script, script2), isTrue);
+  },
 ];
 
 main(args) => runIsolateTests(args, tests);