Format all tests.

tests/corelib_strong/collection_test.dart

Index: tests/corelib_strong/collection_test.dart
diff --git a/tests/corelib_strong/collection_test.dart b/tests/corelib_strong/collection_test.dart
index 1b5696006ee1aec9c7edddfe884483ba9a032fb7..54fbc8bed4eff8be002f8e2e6614c18a3bd9fea2 100644
--- a/tests/corelib_strong/collection_test.dart
+++ b/tests/corelib_strong/collection_test.dart
@@ -13,12 +13,13 @@ class CollectionTest {
   }
 
   void testFold(Iterable<int> iterable) {
-    Expect.equals(28, iterable.fold/*<int>*/(0, (prev, element) => prev + element));
-    Expect.equals(3024, iterable.fold/*<int>*/(1, (prev, element) => prev * element));
+    Expect.equals(
+        28, iterable.fold/*<int>*/(0, (prev, element) => prev + element));
+    Expect.equals(
+        3024, iterable.fold/*<int>*/(1, (prev, element) => prev * element));
   }
 }
 
-
 main() {
   final TEST_ELEMENTS = const [4, 2, 6, 7, 9];
   // Const list.