Fix warnings_checker.dart handling of multitests

tests/lib/async/future_test.dart

Index: tests/lib/async/future_test.dart
diff --git a/tests/lib/async/future_test.dart b/tests/lib/async/future_test.dart
index 93c9c3a3bbaa8e956bd16d4671f77fd9270542b9..2e64e729092a7915475578fe6e7019553ac3876b 100644
--- a/tests/lib/async/future_test.dart
+++ b/tests/lib/async/future_test.dart
@@ -973,9 +973,9 @@ void testTypes() {
              new Future<int>.delayed(Duration.ZERO, () => value));
     testType("Future.microtask($value)",
              new Future<int>.microtask(() => value));
-    testType("Future.sync($value)", new Future<int>.sync(() => value)); // /// 01: ok
-    testType("Future.sync(future($value))", //                             /// 01: continued
-             new Future<int>.sync(() async => new Future.value(value))); /// 01: continued
+    testType("Future.sync($value)", new Future<int>.sync(() => value)); // //# 01: ok
+    testType("Future.sync(future($value))", //                             //# 01: continued
+             new Future<int>.sync(() async => new Future.value(value))); //# 01: continued
     testType("Future.value($value)", new Future<int>.value(value));
   }
   testType("Completer.future", new Completer<int>().future);