Fix warnings_checker.dart handling of multitests

tests/language/super_no_such_method3_test.dart

Index: tests/language/super_no_such_method3_test.dart
diff --git a/tests/language/super_no_such_method3_test.dart b/tests/language/super_no_such_method3_test.dart
index ad5d2579d707174dc68ad4bee2e6d960adddee78..3e81f233538a20ddda866ca48474c05e3bae22a0 100644
--- a/tests/language/super_no_such_method3_test.dart
+++ b/tests/language/super_no_such_method3_test.dart
@@ -17,10 +17,10 @@ class B extends A {
     result = 87;
   }
 
-  set foo(v) => super.foo = v; /// 01: static type warning
+  set foo(v) => super.foo = v; //# 01: static type warning
 }
 
 main() {
-  new B().foo = 0; //          /// 01: continued
-  Expect.equals(42, result); /// 01: continued
+  new B().foo = 0; //          //# 01: continued
+  Expect.equals(42, result); //# 01: continued
 }