Fix kernel test case format error.

pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart

Index: pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart
diff --git a/pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart b/pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart
index 1509a09946927080638a10397c70f2dc7be44e62..e13e1e6191e62cb359536dadb8a9903b0dc826a2 100644
--- a/pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart
+++ b/pkg/kernel/testcases/reify/generic_methods_shadowing_test.dart
@@ -13,7 +13,6 @@ class X {}
 class Y {}
 
 bool foo<T, S>(T t, S s) {
-
   // The type parameter T of bar shadows the type parameter T of foo.
   bool bar<T>(T t) {
     return t is T && t is S;