Run dartfmt on all files under runtime.

runtime/observatory/tests/service/logging_test.dart

Index: runtime/observatory/tests/service/logging_test.dart
diff --git a/runtime/observatory/tests/service/logging_test.dart b/runtime/observatory/tests/service/logging_test.dart
index 777412fd08f5b677bd7e807dec7e93d280585242..1ec0a9acd7e127679b93daf9759b2d200afe96a0 100644
--- a/runtime/observatory/tests/service/logging_test.dart
+++ b/runtime/observatory/tests/service/logging_test.dart
@@ -12,8 +12,7 @@ import 'test_helper.dart';
 void init() {
   Logger.root.level = Level.ALL;
   Logger.root.onRecord.listen((logRecord) {
-    developer.log(
-        logRecord.message,
+    developer.log(logRecord.message,
         time: logRecord.time,
         sequenceNumber: logRecord.sequenceNumber,
         level: logRecord.level.value,
@@ -50,7 +49,5 @@ var tests = [
   }),
 ];
 
-main(args) => runIsolateTests(args,
-                              tests,
-                              testeeBefore: init,
-                              testeeConcurrent: run);
+main(args) =>
+    runIsolateTests(args, tests, testeeBefore: init, testeeConcurrent: run);