Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/service/step_test.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 import 'test_helper.dart';
 import 'service_test_common.dart';
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 18 matching lines @@
       expect(pauseEventsSeen > 20, true,
           reason: "Saw only $pauseEventsSeen pause events.");
       await cancelStreamSubscription(VM.kDebugStream);
       completer.complete();
     }
   });
   isolate.resume();
   return completer.future;
 }
 
-var tests = [
-  hasPausedAtStart,
-  markDartColonLibrariesDebuggable,
-  setBreakpointAtLine(LINE_A),
-  stepThroughProgram
-];
+var tests = [hasPausedAtStart,
+             markDartColonLibrariesDebuggable,
+             setBreakpointAtLine(LINE_A),
+             stepThroughProgram];
 
 main(args) => runIsolateTestsSynchronous(args, tests,
     testeeConcurrent: code, pause_on_start: true, pause_on_exit: true);