Fix warnings_checker.dart handling of multitests

tests/language_strong/function_type_alias7_test.dart

Index: tests/language_strong/function_type_alias7_test.dart
diff --git a/tests/language_strong/function_type_alias7_test.dart b/tests/language_strong/function_type_alias7_test.dart
index fe07e0e6a932bfedcbac89b7815c7d38d8f93f0c..dadb5878d9c7dab4e6c9962d4f75a96133d99991 100644
--- a/tests/language_strong/function_type_alias7_test.dart
+++ b/tests/language_strong/function_type_alias7_test.dart
@@ -5,17 +5,17 @@
 
 typedef void funcType([int arg]);
 
-typedef void badFuncType([int arg = 0]); // /// 00: compile-time error
+typedef void badFuncType([int arg = 0]); // //# 00: compile-time error
 
-typedef void badFuncType({int arg: 0}); // /// 02: compile-time error
+typedef void badFuncType({int arg: 0}); // //# 02: compile-time error
 
 class A
-  extends funcType // /// 01: compile-time error
+  extends funcType // //# 01: compile-time error
 {
 }
 
 main() {
   new A();
-  badFuncType f; // /// 00: continued
-  badFuncType f; // /// 02: continued
+  badFuncType f; // //# 00: continued
+  badFuncType f; // //# 02: continued
 }