Fix warnings_checker.dart handling of multitests

tests/language/first_class_types_literals_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 C<T, U, V> {}
 
 class D {}
 
@@ skipping 23 matching lines @@
 
   // Test that class literals return instances of Type.
   Expect.isTrue((D).runtimeType is Type);
   Expect.isTrue((dynamic).runtimeType is Type);
 
   // Test that types from runtimeType and literals agree.
   Expect.equals(int, 1.runtimeType);
   Expect.equals(String, 'hest'.runtimeType);
   Expect.equals(double, (0.5).runtimeType);
   Expect.equals(bool, true.runtimeType);
-  Expect.equals(C, new C().runtimeType); // /// 01: ok
-  Expect.equals(D, new D().runtimeType); // /// 02: ok
+  Expect.equals(C, new C().runtimeType); // //# 01: ok
+  Expect.equals(D, new D().runtimeType); // //# 02: ok
 
   // runtimeType on type is idempotent.
   Expect.equals((D).runtimeType, (D).runtimeType.runtimeType);
 
   // Test that operator calls on class literals go to Type.
-  Expect.throws(() => C = 1, (e) => e is NoSuchMethodError); /// 03: static type warning
-  Expect.throws(() => C++, (e) => e is NoSuchMethodError); /// 04: static type warning
-  Expect.throws(() => C + 1, (e) => e is NoSuchMethodError); /// 05: static type warning
-  Expect.throws(() => C[2], (e) => e is NoSuchMethodError); /// 06: static type warning
-  Expect.throws(() => C[2] = 'hest', (e) => e is NoSuchMethodError); /// 07: static type warning
-  Expect.throws(() => dynamic = 1, (e) => e is NoSuchMethodError); /// 08: static type warning
-  Expect.throws(() => dynamic++, (e) => e is NoSuchMethodError); /// 09: static type warning
-  Expect.throws(() => dynamic + 1, (e) => e is NoSuchMethodError); /// 10: static type warning
-  Expect.throws(() => dynamic[2], (e) => e is NoSuchMethodError); /// 11: static type warning
-  Expect.throws(() => dynamic[2] = 'hest', (e) => e is NoSuchMethodError); /// 12: static type warning
+  Expect.throws(() => C = 1, (e) => e is NoSuchMethodError); //# 03: static type warning
+  Expect.throws(() => C++, (e) => e is NoSuchMethodError); //# 04: static type warning
+  Expect.throws(() => C + 1, (e) => e is NoSuchMethodError); //# 05: static type warning
+  Expect.throws(() => C[2], (e) => e is NoSuchMethodError); //# 06: static type warning
+  Expect.throws(() => C[2] = 'hest', (e) => e is NoSuchMethodError); //# 07: static type warning
+  Expect.throws(() => dynamic = 1, (e) => e is NoSuchMethodError); //# 08: static type warning
+  Expect.throws(() => dynamic++, (e) => e is NoSuchMethodError); //# 09: static type warning
+  Expect.throws(() => dynamic + 1, (e) => e is NoSuchMethodError); //# 10: static type warning
+  Expect.throws(() => dynamic[2], (e) => e is NoSuchMethodError); //# 11: static type warning
+  Expect.throws(() => dynamic[2] = 'hest', (e) => e is NoSuchMethodError); //# 12: static type warning
 
   Expect.equals((dynamic).toString(), 'dynamic');
 }