Format samples and samples-dev directories.

samples-dev/swarm/test/swarm_ui_lib/observable/observable_value_tests.dart

 // Copyright (c) 2011, 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 observable_tests;
 
 testObservableValue() {
   test('ObservableValue', () {
     final value = new ObservableValue<String>('initial');
     expect(value.value, equals('initial'));
@@ skipping 15 matching lines @@
     expect(result, isNotNull);
     expect(result.events.length, equals(1));
     validateUpdate(result.events[0], value, 'value', null, 'newer', 'new');
   });
 
   test('does not raise event if unchanged', () {
     final value = new ObservableValue<String>('foo');
     expect(value.value, equals('foo'));
 
     bool called = false;
-    value.addChangeListener((summary) { called = true; });
+    value.addChangeListener((summary) {
+      called = true;
+    });
 
     // Set it to the same value.
     value.value = 'foo';
 
     // Should not have gotten an event.
     expect(called, isFalse);
   });
 }