Fix warnings_checker.dart handling of multitests

tests/language/compile_time_constant_checked_test.dart

Index: tests/language/compile_time_constant_checked_test.dart
diff --git a/tests/language/compile_time_constant_checked_test.dart b/tests/language/compile_time_constant_checked_test.dart
index 26c0ecc61632955c1ddc670abed1348777f4b8e5..bff157e50524f0a2390d579e3f0c0e1700bf4a3f 100644
--- a/tests/language/compile_time_constant_checked_test.dart
+++ b/tests/language/compile_time_constant_checked_test.dart
@@ -2,12 +2,12 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-final int x = 'foo'; /// 01: static type warning, dynamic type error
-const int y = 'foo'; /// 02: static type warning, checked mode compile-time error
-int z = 'foo'; /// 03: static type warning, dynamic type error
+final int x = 'foo'; //# 01: static type warning, dynamic type error
+const int y = 'foo'; //# 02: static type warning, checked mode compile-time error
+int z = 'foo'; //# 03: static type warning, dynamic type error
 
 main() {
-  print(x); /// 01: continued
-  print(y); /// 02: continued
-  print(z); /// 03: continued
+  print(x); //# 01: continued
+  print(y); //# 02: continued
+  print(z); //# 03: continued
 }