Fix warnings_checker.dart handling of multitests

tests/language/constructor_duplicate_final_test.dart

Index: tests/language/constructor_duplicate_final_test.dart
diff --git a/tests/language/constructor_duplicate_final_test.dart b/tests/language/constructor_duplicate_final_test.dart
index 0c2169926cf9a316fcf4d3be395f07f5e6481798..e51f3124273b79bf9644ba458a989fc04fc4f94c 100644
--- a/tests/language/constructor_duplicate_final_test.dart
+++ b/tests/language/constructor_duplicate_final_test.dart
@@ -8,17 +8,17 @@
 class Class {
   final f = 10;
 
-  Class(v) : f = v; // /// 01: runtime error, static type warning
+  Class(v) : f = v; // //# 01: runtime error, static type warning
 
-  Class(this.f); // /// 02: runtime error, static type warning
+  Class(this.f); // //# 02: runtime error, static type warning
 
   // If a field is initialized multiple times in the initializer
   // list, it's a compile time error.
-  Class(this.f) : f = 0; // /// 03: compile-time error
+  Class(this.f) : f = 0; // //# 03: compile-time error
 }
 
 main() {
-  new Class(5); // /// 01: continued
-  new Class(5); // /// 02: continued
-  new Class(5); // /// 03: continued
+  new Class(5); // //# 01: continued
+  new Class(5); // //# 02: continued
+  new Class(5); // //# 03: continued
 }