Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/repositories/target.dart

 // Copyright (c) 2016, 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.
 
 part of mocks;
 
 class TargetChangeEventMock implements M.TargetChangeEvent {
   final TargetRepositoryMock repository;
   const TargetChangeEventMock({this.repository});
 }
@@ skipping 46 matching lines @@
   }
 
   void triggerChangeEvent() {
     _onChange.add(new TargetChangeEventMock(repository: this));
   }
 
   M.Target find(String networkAddress) {
     return null;
   }
 
-  TargetRepositoryMock(
-      {M.Target current,
-      Iterable<M.Target> list: const [],
+  TargetRepositoryMock({M.Target current, Iterable<M.Target> list : const [],
       TargetRepositoryMockStringCallback add,
       TargetRepositoryMockTargetCallback setCurrent,
       TargetRepositoryMockTargetCallback delete})
-      : _current = current,
-        _list = list,
-        _add = add,
-        _setCurrent = setCurrent,
-        _delete = delete;
+    : _current = current,
+      _list = list,
+      _add = add,
+      _setCurrent = setCurrent,
+      _delete = delete;
 }