Format all tests.

tests/corelib/list_fill_range_test.dart

Index: tests/corelib/list_fill_range_test.dart
diff --git a/tests/corelib/list_fill_range_test.dart b/tests/corelib/list_fill_range_test.dart
index 4553e430afc0c54398e7ab225cac59a80f7f1801..cff66e9af8fe44fc9fb03465b0adfc88b0d55d43 100644
--- a/tests/corelib/list_fill_range_test.dart
+++ b/tests/corelib/list_fill_range_test.dart
@@ -24,9 +24,15 @@ class MyList extends ListBase {
   List list;
   MyList(this.list);
   get length => list.length;
-  set length(value) { list.length = value; }
+  set length(value) {
+    list.length = value;
+  }
+
   operator [](index) => list[index];
-  operator []=(index, val) { list[index] = val; }
+  operator []=(index, val) {
+    list[index] = val;
+  }
+
   toString() => list.toString();
 }