Fix warnings_checker.dart handling of multitests

tests/lib_strong/mirrors/circular_factory_redirection_test.dart

Index: tests/lib_strong/mirrors/circular_factory_redirection_test.dart
diff --git a/tests/lib_strong/mirrors/circular_factory_redirection_test.dart b/tests/lib_strong/mirrors/circular_factory_redirection_test.dart
index 997a319adfe509108d0f7f55888d920de21dc5f8..4823f55a5c840a645672594c0767c914f3433fb5 100644
--- a/tests/lib_strong/mirrors/circular_factory_redirection_test.dart
+++ b/tests/lib_strong/mirrors/circular_factory_redirection_test.dart
@@ -7,25 +7,25 @@ import "package:expect/expect.dart";
 
 class A {
   A();
-  A.circular() = B.circular; // /// 01: compile-time error
-  const A.circular2() = B.circular2; // /// 02: compile-time error
+  A.circular() = B.circular; // //# 01: compile-time error
+  const A.circular2() = B.circular2; // //# 02: compile-time error
 }
 class B {
   B();
-  B.circular() = C.circular; // /// 01: continued
-  const B.circular2() = C.circular2; // /// 02: continued
+  B.circular() = C.circular; // //# 01: continued
+  const B.circular2() = C.circular2; // //# 02: continued
 }
 class C {
   C();
-  C.circular() = A.circular; // /// 01: continued
-  const C.circular2() = A.circular2; // /// 02: continued
+  C.circular() = A.circular; // //# 01: continued
+  const C.circular2() = A.circular2; // //# 02: continued
 }
 
 main() {
   ClassMirror cm = reflectClass(A);
 
-  new A.circular(); // /// 01: continued
-  new A.circular2(); // /// 02: continued
+  new A.circular(); // //# 01: continued
+  new A.circular2(); // //# 02: continued
 
   Expect.throws(() => cm.newInstance(#circular, []),
                 (e) => e is NoSuchMethodError,