Update all tests

tests/language/missing_const_constructor_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 // Test handling of unknown constructor in const expression.
 
 class GoodClass {
   const GoodClass();
 }
 
 GoodClass GOOD_CLASS
-    = const GoodClass() /// 01: ok
-    = const GoodClass.BAD_NAME() /// 02: compile-time error
-    = const GoodClass("bad arg") /// 03: compile-time error
+    = const GoodClass() //# 01: ok
+    = const GoodClass.BAD_NAME() //# 02: compile-time error
+    = const GoodClass("bad arg") //# 03: compile-time error
 ;
 
 
-const BadClass BAD_CLASS = const BadClass(); /// 04: compile-time error
-BadClass BAD_CLASS = const BadClass(); /// 05: compile-time error
+const BadClass BAD_CLASS = const BadClass(); //# 04: compile-time error
+BadClass BAD_CLASS = const BadClass(); //# 05: compile-time error
 
 void main() {
   try {
     print(GOOD_CLASS);
-    print(BAD_CLASS); /// 04: continued
-    print(BAD_CLASS); /// 05: continued
-    print(const BadClass()); /// 06: compile-time error
+    print(BAD_CLASS); //# 04: continued
+    print(BAD_CLASS); //# 05: continued
+    print(const BadClass()); //# 06: compile-time error
   } catch (e) {
 
   }
 }