Fix warnings_checker.dart handling of multitests

tests/language/factory_implementation_test.dart

Index: tests/language/factory_implementation_test.dart
diff --git a/tests/language/factory_implementation_test.dart b/tests/language/factory_implementation_test.dart
index f8aaadbb95e01f01a244ebbfd897766c93e54d2e..dc1faad04fa71f8b5e61fd5d4c38d778a1829281 100644
--- a/tests/language/factory_implementation_test.dart
+++ b/tests/language/factory_implementation_test.dart
@@ -36,8 +36,8 @@ main() {
   Expect.equals(1, a.x);
   Expect.equals(2, a.y);
 
-  var x = new X(11, 22); // /// 00: dynamic type error
+  var x = new X(11, 22); // //# 00: dynamic type error
   // Check that factory is invoked.
-  Expect.equals(110, x.x); // /// 00: continued
-  Expect.equals(220, x.y); // /// 00: continued
+  Expect.equals(110, x.x); // //# 00: continued
+  Expect.equals(220, x.y); // //# 00: continued
 }