Run dartfmt on all files under runtime.

runtime/observatory/tests/service/reload_sources_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
 
 import 'test_helper.dart';
 import 'dart:developer';
 import 'service_test_common.dart';
 
 testMain() {
-  debugger();  // Stop here.
+  debugger(); // Stop here.
   print('1');
-  while (true) {
-  }
+  while (true) {}
 }
 
 var tests = [
   // Stopped at 'debugger' statement.
   hasStoppedAtBreakpoint,
   // Reload sources and request to pause post reload. The pause request will be
   // ignored because we are already paused at a breakpoint.
   reloadSources(true),
   // Ensure that we are still stopped at a breakpoint.
   hasStoppedAtBreakpoint,
   // Resume the isolate into the while loop.
   resumeIsolate,
   // Reload sources and request to pause post reload. The pause request will
   // be respected because we are not already paused.
   reloadSources(true),
   // Ensure that we are paused post reload request.
   hasStoppedPostRequest,
   // Resume the isolate.
   resumeIsolate,
   // Verify that it is running.
   isolateIsRunning,
   // Reload sources and do not request to pause post reload.
   reloadSources(false),
   // Verify that it is running.
   isolateIsRunning,
 ];
 
 main(args) => runIsolateTests(args, tests, testeeConcurrent: testMain);