Fix warnings_checker.dart handling of multitests

tests/language_strong/static_field_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.
 // Dart test program for testing setting/getting/initializing static fields.
 
 import "package:expect/expect.dart";
 
 class First {
   First() {}
   static var a;
@@ skipping 47 matching lines @@
     Expect.equals(15, First.a);
     Expect.equals(15, First.b);
     Expect.equals(35, First.setValues());
     Expect.equals(24, First.a);
     Expect.equals(10, First.b);
   }
 }
 
 
 class StaticField1RunNegativeTest {
-  static // /// 01: static type warning, runtime error
+  static // //# 01: static type warning, runtime error
     var x;
   testMain() {
     var foo = new StaticField1RunNegativeTest();
     print(x); // Used to compile 'x' and force any errors.
     var result = foo.x;
   }
 }
 
 class StaticField1aRunNegativeTest {
-  static // /// 02: static type warning, runtime error
+  static // //# 02: static type warning, runtime error
     void m() {}
 
   testMain() {
     var foo = new StaticField1aRunNegativeTest();
     print(m); // Used to compile 'm' and force any errors.
     var result = foo.m;
   }
 }
 
 class StaticField2RunNegativeTest {
-  static /// 03:  static type warning, runtime error
+  static //# 03:  static type warning, runtime error
     var x;
 
   testMain() {
     var foo = new StaticField2RunNegativeTest();
     print(x); // Used to compile 'x' and force any errors.
     foo.x = 1;
   }
 }
 
 class StaticField2aRunNegativeTest {
-  static //  /// 04: static type warning, runtime error
+  static //  //# 04: static type warning, runtime error
     void m() {}
 
   testMain() {
     var foo = new StaticField2aRunNegativeTest();
     print(m); // Used to compile 'm' and force any errors.
-    foo.m = 1; /// 04:continued
+    foo.m = 1; //# 04:continued
   }
 }
 
 main() {
   StaticFieldTest.testMain();
   InitializerTest.testStaticFieldInitialization();
   new StaticField1RunNegativeTest().testMain();
   new StaticField1aRunNegativeTest().testMain();
   new StaticField2RunNegativeTest().testMain();
   new StaticField2aRunNegativeTest().testMain();
 }