Format all tests.

tests/language_strong/js_properties_test.dart

Index: tests/language_strong/js_properties_test.dart
diff --git a/tests/language_strong/js_properties_test.dart b/tests/language_strong/js_properties_test.dart
index fdca010a4f101ef17dedcef5dab8a1854ca2d434..b93a5474c0ca767da8149e934b16090c85a355ba 100644
--- a/tests/language_strong/js_properties_test.dart
+++ b/tests/language_strong/js_properties_test.dart
@@ -25,13 +25,23 @@ class Hello {
 }
 
 class __defineGetter__ extends Hello {}
+
 class __defineSetter__ extends Hello {}
+
 class __lookupGetter__ extends Hello {}
+
 class __lookupSetter__ extends Hello {}
+
 class constructor extends Hello {}
+
 class hasOwnProperty extends Hello {}
+
 class isPrototypeOf extends Hello {}
+
 class propertyIsEnumerable extends Hello {}
+
 class toLocaleString extends Hello {}
+
 class toString extends Hello {}
+
 class valueOf extends Hello {}