Format all tests.

tests/corelib/iterable_to_set_test.dart

Index: tests/corelib/iterable_to_set_test.dart
diff --git a/tests/corelib/iterable_to_set_test.dart b/tests/corelib/iterable_to_set_test.dart
index ee1bcfda9a16dfb32f26327a4aaf543ae5464fe6..628ddb89b1ee0cd0d070c58ba9474232f4be3438 100644
--- a/tests/corelib/iterable_to_set_test.dart
+++ b/tests/corelib/iterable_to_set_test.dart
@@ -9,13 +9,9 @@ main() {
   List<int> list2 = const <int>[4, 4];
   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<String> set2 = new Set<String>();
-  set2..add("foo")
-      ..add("bar")
-      ..add("toto");
+  set2..add("foo")..add("bar")..add("toto");
   Set set3 = new Set();
 
   var setCopy = list1.toSet();