Format all tests.

tests/language/regress_23089_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.
 
-abstract class IPeer<C extends IP2PClient> {
-}
+abstract class IPeer<C extends IP2PClient> {}
 
-abstract class IPeerRoom<P extends IPeer, C extends IP2PClient> {
-}
+abstract class IPeerRoom<P extends IPeer, C extends IP2PClient> {}
 
-abstract class IP2PClient<R extends IPeerRoom> {
+abstract class IP2PClient<R extends IPeerRoom> {}
 
-}
-
-class _Peer<C extends _P2PClient> implements IPeer<C> {
-
-}
+class _Peer<C extends _P2PClient> implements IPeer<C> {}
 
 class _PeerRoom<P extends _Peer, C extends _P2PClient>
-    implements IPeerRoom<P, C> {
-
-}
+    implements IPeerRoom<P, C> {}
 
 abstract class _P2PClient<R extends _PeerRoom, P extends _Peer>
-    implements IP2PClient<R> {
+    implements IP2PClient<R> {}
 
-}
-
-void main() {
-}
+void main() {}