Update all tests

tests/language/mixin_forwarding_constructor4_test.dart

Index: tests/language/mixin_forwarding_constructor4_test.dart
diff --git a/tests/language/mixin_forwarding_constructor4_test.dart b/tests/language/mixin_forwarding_constructor4_test.dart
index 5230a10a9ccb89542540c86065481b5f127044aa..2345d2e52d26a5d7d07f2cc8ab1a009d23bb5a73 100644
--- a/tests/language/mixin_forwarding_constructor4_test.dart
+++ b/tests/language/mixin_forwarding_constructor4_test.dart
@@ -10,15 +10,15 @@ abstract class Mixin {}
 
 class Base {
   Base(
-      {x}        /// 01: compile-time error
-      {x}        /// 02: compile-time error
-      {x}        /// 03: compile-time error
+      {x}        //# 01: compile-time error
+      {x}        //# 02: compile-time error
+      {x}        //# 03: compile-time error
     );
 }
 
 class C extends Base with Mixin {
-  C();           /// 02: continued
-  C() : super(); /// 03: continued
+  C();           //# 02: continued
+  C() : super(); //# 03: continued
 }
 
 main() {