anchor.diff:  //
   // Visiting Let...
   // Visiting Call...
  -// Visiting Const ("Hello",...)
  -// Visiting Const (" ",...)
  -// Visiting Const ("world",...)
  +// Visiting Const ("Hello", ...)
  +// Visiting Const (" ", ...)
  +// Visiting Const ("world", ...)
   // Visiting IfThenElse...
   // Visiting Call...
   // Visiting Call...
  
positive.code: let checker = FSharpChecker.Create(keepAssemblyContents=true)
  
  let parseAndCheckSingleFile (input) = 
      let file = Path.ChangeExtension(System.IO.Path.GetTempFileName(),"fsx")  
      File.WriteAllText(file, input)
      // Get context representing a stand-alone (script) file
      let projOptions = 
  
negative.code: 
  let myLibraryEntity, myLibraryDecls =    
     match checkedFile.Declarations.[0] with 
     | FSharpImplementationFileDeclaration.Entity (e, subDecls) -> (e, subDecls)
     | _ -> failwith "unexpected"
  
  
  