Fix warnings_checker.dart handling of multitests

tests/language_strong/deferred_constraints_type_annotation_test.dart

Index: tests/language_strong/deferred_constraints_type_annotation_test.dart
diff --git a/tests/language_strong/deferred_constraints_type_annotation_test.dart b/tests/language_strong/deferred_constraints_type_annotation_test.dart
index 49169bc63fd42a4214719e4051a24aff93c56a05..44e0c2762257f452b129d40ef56ab23441061363 100644
--- a/tests/language_strong/deferred_constraints_type_annotation_test.dart
+++ b/tests/language_strong/deferred_constraints_type_annotation_test.dart
@@ -6,45 +6,45 @@ import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 
 import "deferred_constraints_lib.dart" deferred as lib;
-import "deferred_constraints_lib.dart" as lib2; /// type_annotation_non_deferred: ok
+import "deferred_constraints_lib.dart" as lib2; //# type_annotation_non_deferred: ok
 
 class F {}
 class G2<T> {}
 
 main() {
-  lib.C a = null; /// type_annotation_null: compile-time error
-  Expect.throws(() { /// new_before_load: compile-time error
-    lib.C a = new lib.C(); /// new_before_load: continued
-  }, (e) => e is Error); /// new_before_load: continued
+  lib.C a = null; //# type_annotation_null: compile-time error
+  Expect.throws(() { //# new_before_load: compile-time error
+    lib.C a = new lib.C(); //# new_before_load: continued
+  }, (e) => e is Error); //# new_before_load: continued
 
   // In this case we do not defer C.
-  lib2.C a1 = new lib2.C(); /// type_annotation_non_deferred: continued
+  lib2.C a1 = new lib2.C(); //# type_annotation_non_deferred: continued
   asyncStart();
   lib.loadLibrary().then((_) {
-    lib.C a2 = new lib.C(); /// type_annotation1: dynamic type error, compile-time error
-    lib.G<F> a3 = new lib.G<F>(); /// type_annotation_generic1: dynamic type error, compile-time error
-    G2<lib.C> a4 = new G2(); /// type_annotation_generic2: compile-time error
-    G2<lib.C> a5 = new G2<lib.C>(); /// type_annotation_generic3: compile-time error
-    lib.G<lib.C> a = new lib.G<lib.C>(); /// type_annotation_generic4: dynamic type error, compile-time error
-    var a6 = new lib.C(); /// new: ok
-    var g1 = new lib.G<F>(); /// new_generic1: ok
+    lib.C a2 = new lib.C(); //# type_annotation1: dynamic type error, compile-time error
+    lib.G<F> a3 = new lib.G<F>(); //# type_annotation_generic1: dynamic type error, compile-time error
+    G2<lib.C> a4 = new G2(); //# type_annotation_generic2: compile-time error
+    G2<lib.C> a5 = new G2<lib.C>(); //# type_annotation_generic3: compile-time error
+    lib.G<lib.C> a = new lib.G<lib.C>(); //# type_annotation_generic4: dynamic type error, compile-time error
+    var a6 = new lib.C(); //# new: ok
+    var g1 = new lib.G<F>(); //# new_generic1: ok
     // new G2<lib.C>() does not give a dynamic type error because a malformed
     // type used as type-parameter is treated as dynamic.
-    var g2 = new G2<lib.C>(); /// new_generic2: compile-time error
-    var g3 = new lib.G<lib.C>(); /// new_generic3: compile-time error
+    var g2 = new G2<lib.C>(); //# new_generic2: compile-time error
+    var g3 = new lib.G<lib.C>(); //# new_generic3: compile-time error
     var instance = lib.constantInstance;
-    Expect.throws(() { /// is_check: compile-time error
-      bool a7 = instance is lib.Const; /// is_check: continued
-    }, (e) => e is TypeError); /// is_check: continued
-    Expect.throws(() { /// as_operation: compile-time error
-      instance as lib.Const; /// as_operation: continued
-    }, (e) => e is TypeError); /// as_operation: continued
-    Expect.throws(() { /// catch_check: compile-time error
-      try { throw instance; } on lib.Const {} /// catch_check: continued
-    }, (e) => e is TypeError); /// catch_check: continued
-    int i = lib.C.staticMethod(); /// static_method: ok
+    Expect.throws(() { //# is_check: compile-time error
+      bool a7 = instance is lib.Const; //# is_check: continued
+    }, (e) => e is TypeError); //# is_check: continued
+    Expect.throws(() { //# as_operation: compile-time error
+      instance as lib.Const; //# as_operation: continued
+    }, (e) => e is TypeError); //# as_operation: continued
+    Expect.throws(() { //# catch_check: compile-time error
+      try { throw instance; } on lib.Const {} //# catch_check: continued
+    }, (e) => e is TypeError); //# catch_check: continued
+    int i = lib.C.staticMethod(); //# static_method: ok
     asyncEnd();
   });
 }
 
-lib.C a9 = null; /// type_annotation_top_level: compile-time error
+lib.C a9 = null; //# type_annotation_top_level: compile-time error