Fix warnings_checker.dart handling of multitests

tests/language/least_upper_bound_expansive_test.dart

Index: tests/language/least_upper_bound_expansive_test.dart
diff --git a/tests/language/least_upper_bound_expansive_test.dart b/tests/language/least_upper_bound_expansive_test.dart
index 704b2a384faefb22cc9a892a87481f363ac20185..aaa50b9d336f28dff8cdf135d5ccbeffe84f7408 100644
--- a/tests/language/least_upper_bound_expansive_test.dart
+++ b/tests/language/least_upper_bound_expansive_test.dart
@@ -40,17 +40,17 @@ void testC1(bool z, C1<int> a, N<C1<String>> b) {
     // Object is the most specific type in the intersection of the supertypes.
 
     // Is least upper bound dynamic?
-    (z ? a : b).z; /// 01: static type warning
+    (z ? a : b).z; //# 01: static type warning
     // Is least upper bound N<...> ?
-    (z ? a : b).n; /// 02: static type warning
+    (z ? a : b).n; //# 02: static type warning
     // Is least upper bound C1<...> ?
-    (z ? a : b).c1; /// 03: static type warning
+    (z ? a : b).c1; //# 03: static type warning
     // Is least upper bound N<dynamic> ?
-    (z ? a : b).n.z; /// 04: static type warning
+    (z ? a : b).n.z; //# 04: static type warning
     // Is least upper bound N<N<...>> ?
-    (z ? a : b).n.n; /// 05: static type warning
+    (z ? a : b).n.n; //# 05: static type warning
     // Is least upper bound N<C1<...>> ?
-    (z ? a : b).n.c1; /// 06: static type warning
+    (z ? a : b).n.c1; //# 06: static type warning
   }
 }
 
@@ -81,17 +81,17 @@ void testC2(bool z, C2<int> a, N<C2<String>> b) {
     // Object is the most specific type in the intersection of the supertypes.
 
     // Is least upper bound dynamic?
-    (z ? a : b).z; /// 07: static type warning
+    (z ? a : b).z; //# 07: static type warning
     // Is least upper bound N<...> ?
-    (z ? a : b).n; /// 08: static type warning
+    (z ? a : b).n; //# 08: static type warning
     // Is least upper bound C2<...> ?
-    (z ? a : b).c2; /// 09: static type warning
+    (z ? a : b).c2; //# 09: static type warning
     // Is least upper bound N<dynamic> ?
-    (z ? a : b).n.z; /// 10: static type warning
+    (z ? a : b).n.z; //# 10: static type warning
     // Is least upper bound N<N<...>> ?
-    (z ? a : b).n.n; /// 11: static type warning
+    (z ? a : b).n.n; //# 11: static type warning
     // Is least upper bound N<C2<...>> ?
-    (z ? a : b).n.c2; /// 12: static type warning
+    (z ? a : b).n.c2; //# 12: static type warning
   }
 }