Fix warnings_checker.dart handling of multitests

tests/language_strong/factory_redirection_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 
 class A<T> {
   A() : x = null;
 
   const A.constant(this.x);
 
   factory A.factory() {
     return new B<Set>();
   }
 
-  factory A.test01() = T; // /// 01: runtime error
+  factory A.test01() = T; // //# 01: runtime error
 
-  factory A.test02() = dynamic; // /// 02: runtime error
+  factory A.test02() = dynamic; // //# 02: runtime error
 
-  factory A.test03() = Undefined; // /// 03: runtime error
+  factory A.test03() = Undefined; // //# 03: runtime error
 
-  factory A.test04() = C.test04; // /// 04: compile-time error
+  factory A.test04() = C.test04; // //# 04: compile-time error
 
   final T x;
 }
 
 class B<T> extends A<T> {
   B();
 
   factory B.A() = A<T>;
 
   const factory B.A_constant(T x) = A<T>.constant;
 
   factory B.A_factory() = A<T>.factory;
 
-  factory B.test04() = A.test04; // /// 04: continued
+  factory B.test04() = A.test04; // //# 04: continued
 
-  factory B.test05(int incompatible) = A<T>.factory; // /// 05: runtime error
+  factory B.test05(int incompatible) = A<T>.factory; // //# 05: runtime error
 
-  factory B.test05(int incompatible) = A<T>.factory; // /// 06: runtime error
+  factory B.test05(int incompatible) = A<T>.factory; // //# 06: runtime error
 }
 
 class C<K, V> extends B<V> {
   C();
 
   factory C.A() = A<V>;
 
   factory C.A_factory() = A<V>.factory;
 
   const factory C.B_constant(V x) = B<V>.A_constant;
 
-  factory C.test04() = B.test04; // /// 04: continued
+  factory C.test04() = B.test04; // //# 04: continued
 
-  factory C.test06(int incompatible) = B<K>.test05; // /// 06: continued
+  factory C.test06(int incompatible) = B<K>.test05; // //# 06: continued
 
-  const factory C.test07(V x) = B<V>.A; // /// 07: compile-time error
+  const factory C.test07(V x) = B<V>.A; // //# 07: compile-time error
 }
 
 main() {
-  new A<List>.test01(); // /// 01: continued
-  new A<List>.test02(); // /// 02: continued
-  new A<List>.test03(); // /// 03: continued
-  new C.test04(); // /// 04: continued
-  new B.test05(0); // /// 05: continued
-  new C<int, int>.test06(0); // /// 06: continued
-  new C<int, int>.test07(0); // /// 07: continued
+  new A<List>.test01(); // //# 01: continued
+  new A<List>.test02(); // //# 02: continued
+  new A<List>.test03(); // //# 03: continued
+  new C.test04(); // //# 04: continued
+  new B.test05(0); // //# 05: continued
+  new C<int, int>.test06(0); // //# 06: continued
+  new C<int, int>.test07(0); // //# 07: continued
   Expect.isTrue(new A<List>() is A<List>);
   Expect.isTrue(new A<bool>.constant(true).x);
   Expect.isTrue(new A<Set>.factory() is B<Set>);
-  Expect.isTrue(new B<List>.A() is A<List>); // /// 08: dynamic type error
-  Expect.isFalse(new B<List>.A() is A<Set>); // /// 09: dynamic type error
-  Expect.isTrue(new B<bool>.A_constant(true).x); // /// 10: dynamic type error
-  Expect.isTrue(new B<List>.A_factory() is B<Set>); // /// 11: dynamic type error
-  Expect.isTrue(new C<String, num>.A() is A<num>); // /// 12: dynamic type error
-  Expect.isTrue(new C<String, num>.A_factory() is B<Set>); // /// 13: dynamic type error
-  Expect.isTrue(new C<String, bool>.B_constant(true).x); // /// 14: dynamic type error
+  Expect.isTrue(new B<List>.A() is A<List>); // //# 08: dynamic type error
+  Expect.isFalse(new B<List>.A() is A<Set>); // //# 09: dynamic type error
+  Expect.isTrue(new B<bool>.A_constant(true).x); // //# 10: dynamic type error
+  Expect.isTrue(new B<List>.A_factory() is B<Set>); // //# 11: dynamic type error
+  Expect.isTrue(new C<String, num>.A() is A<num>); // //# 12: dynamic type error
+  Expect.isTrue(new C<String, num>.A_factory() is B<Set>); // //# 13: dynamic type error
+  Expect.isTrue(new C<String, bool>.B_constant(true).x); // //# 14: dynamic type error
 }