Fix warnings_checker.dart handling of multitests

tests/language/top_level_getter_no_setter2_test.dart

Index: tests/language/top_level_getter_no_setter2_test.dart
diff --git a/tests/language/top_level_getter_no_setter2_test.dart b/tests/language/top_level_getter_no_setter2_test.dart
index 98c437e8a52739372bc6b6a34c8f9a8cfdbe45db..0bc1406a2432a67c88e3eb22d606dd74b062e5ec 100644
--- a/tests/language/top_level_getter_no_setter2_test.dart
+++ b/tests/language/top_level_getter_no_setter2_test.dart
@@ -14,12 +14,12 @@ class Class {
 
   method() {
     try {
-      getter++; /// 01: static type warning
+      getter++; //# 01: static type warning
     } on NoSuchMethodError catch(e) {
-      Expect.isTrue(getter_visited); /// 01: continued
+      Expect.isTrue(getter_visited); //# 01: continued
       return;
     }
-    Expect.fail('Expected NoSuchMethodError'); /// 01: continued
+    Expect.fail('Expected NoSuchMethodError'); //# 01: continued
   }
 }