Format all tests.

tests/lib/async/stream_periodic3_test.dart

Index: tests/lib/async/stream_periodic3_test.dart
diff --git a/tests/lib/async/stream_periodic3_test.dart b/tests/lib/async/stream_periodic3_test.dart
index b25ae2739fa513e0cf592381d721d489544db2b1..b94e52c5ed6ef8c1d1037659ec13451ed346f2e0 100644
--- a/tests/lib/async/stream_periodic3_test.dart
+++ b/tests/lib/async/stream_periodic3_test.dart
@@ -17,9 +17,9 @@ int get safetyMargin => identical(1, 1.0) ? 5 : 0;
 main() {
   test("stream-periodic3", () {
     Stopwatch watch = new Stopwatch()..start();
-    Stream stream = new Stream.periodic(const Duration(milliseconds: 1),
-                                        (x) => x);
-    stream.take(10).listen((_) { }, onDone: expectAsync(() {
+    Stream stream =
+        new Stream.periodic(const Duration(milliseconds: 1), (x) => x);
+    stream.take(10).listen((_) {}, onDone: expectAsync(() {
       int millis = watch.elapsedMilliseconds + safetyMargin;
       expect(millis, greaterThanOrEqualTo(10));
     }));