Fix for comment about what the file tests

Author: wallymathieu

src/fsharp/FSharp.Core.Unittests/FSharp.Core/Microsoft.FSharp.Core/ResultTests.fs

@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 // Various tests for:
-// Microsoft.FSharp.Core.ExtraTopLevelOperators.printf
+// Microsoft.FSharp.Core.Result
 
 namespace FSharp.Core.Unittests.FSharp_Core.Microsoft_FSharp_Core