Format all tests.

tests/corelib_strong/iterable_take_while_test.dart

Index: tests/corelib_strong/iterable_take_while_test.dart
diff --git a/tests/corelib_strong/iterable_take_while_test.dart b/tests/corelib_strong/iterable_take_while_test.dart
index 1407b5795f4bf17710dfa7da45503d4d614cea5d..1e9b5f99c4c8feb8802ef50d11cefb045254800b 100644
--- a/tests/corelib_strong/iterable_take_while_test.dart
+++ b/tests/corelib_strong/iterable_take_while_test.dart
@@ -9,9 +9,7 @@ main() {
   List<int> list2 = const <int>[4, 5];
   List<String> list3 = <String>[];
   Set<int> set1 = new Set<int>();
-  set1..add(11)
-      ..add(12)
-      ..add(13);
+  set1..add(11)..add(12)..add(13);
   Set set2 = new Set();
 
   Iterable<int> takeWhileFalse = list1.takeWhile((x) => false);