Format all files under the sdk/lib directory.

sdk/lib/async/stream.dart

Index: sdk/lib/async/stream.dart
diff --git a/sdk/lib/async/stream.dart b/sdk/lib/async/stream.dart
index 5c04e83f5c589a987f88edf07612b0c4d037db14..48c40637c1e432fabdd56637e5339edb76d04860 100644
--- a/sdk/lib/async/stream.dart
+++ b/sdk/lib/async/stream.dart
@@ -871,8 +871,8 @@ abstract class Stream<T> {
    * In case of a `done` event the future completes with the given
    * [futureValue].
    */
-  Future<E> drain<E>([E futureValue]) => listen(null, cancelOnError: true)
-      .asFuture<E>(futureValue);
+  Future<E> drain<E>([E futureValue]) =>
+      listen(null, cancelOnError: true).asFuture<E>(futureValue);
 
   /**
    * Provides at most the first [count] data events of this stream.