Run dartfmt on all files under runtime.

runtime/observatory/tests/service/issue_27238_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=--error_on_bad_type --error_on_bad_override  --verbose_debug
 
 import 'service_test_common.dart';
 import 'dart:async';
 import 'test_helper.dart';
 import 'dart:developer';
 
 const int LINE_A = 19;
 const int LINE_B = 22;
 const int LINE_C = 23;
 const int LINE_D = 25;
 const int LINE_E = 26;
 
 testMain() async {
   debugger();
-  Future future1 = new Future.value();  // LINE_A.
+  Future future1 = new Future.value(); // LINE_A.
   Future future2 = new Future.value();
 
-  await future1;  // LINE_B.
-  await future2;  // LINE_C.
+  await future1; // LINE_B.
+  await future2; // LINE_C.
 
   print('foo1'); // LINE_D.
   print('foo2'); // LINE_E.
 }
 
 var tests = [
   hasStoppedAtBreakpoint,
   stoppedAtLine(LINE_A),
   smartNext,
   hasStoppedAtBreakpoint,
   smartNext,
   hasStoppedAtBreakpoint,
   stoppedAtLine(LINE_B),
   smartNext,
   hasStoppedAtBreakpoint,
   stoppedAtLine(LINE_C),
   smartNext,
   hasStoppedAtBreakpoint,
   stoppedAtLine(LINE_D),
   resumeIsolate,
 ];
 
 main(args) => runIsolateTests(args, tests, testeeConcurrent: testMain);