Fix warnings_checker.dart handling of multitests

tests/language/main_test.dart

Index: tests/language/main_test.dart
diff --git a/tests/language/main_test.dart b/tests/language/main_test.dart
index 151636b465980be98e25d1ea6e4b43045b58c448..db9324d874d0403a3587d18894284d5ee48dfdc3 100644
--- a/tests/language/main_test.dart
+++ b/tests/language/main_test.dart
@@ -4,21 +4,21 @@
 
 main(
 
-a //        /// 01: ok
-a, b //     /// 02: ok
-a, b, c //  /// 03: static type warning, runtime error
-a, b, {c} /// 04: ok
-a, b, [c] /// 05: ok
+a //        //# 01: ok
+a, b //     //# 02: ok
+a, b, c //  //# 03: static type warning, runtime error
+a, b, {c} //# 04: ok
+a, b, [c] //# 05: ok
 
-[a] //      /// 20: ok
-a, [b] //   /// 21: ok
-[a, b] //   /// 22: ok
+[a] //      //# 20: ok
+a, [b] //   //# 21: ok
+[a, b] //   //# 22: ok
 
-{a} //      /// 41: ok
-a, {b} //   /// 42: ok
-{a, b} //   /// 43: ok
-[a, b, c] /// 44: ok
-{a, b, c} /// 45: ok
+{a} //      //# 41: ok
+a, {b} //   //# 42: ok
+{a, b} //   //# 43: ok
+[a, b, c] //# 44: ok
+{a, b, c} //# 45: ok
 
 ) {
 }