anchor.diff:      { ExePath = environVar "LOCALAPPDATA" @@ "Apps" @@ "OpenCover" @@ "OpenCover.Console.exe"
         TestRunnerExePath = ProgramFiles @@ "NUnit" @@ "bin" @@ "nunit-console.exe"
         Output = String.Empty
  -      Register = None
  +      Register = Manual
         Filter = String.Empty
         TimeOut = TimeSpan.FromMinutes 5.
         WorkingDir = currentDirectory }
  
positive.code: open System.Text
  
  type RegisterType = 
      | None
      | Register
      | RegisterUser
  
  
negative.code:             append "-output:"
              appendQuoted param.Output
          append (match param.Register with
                  | Manual -> String.Empty
                  | Register -> "-register "
                  | RegisterUser -> "-register:user ")
          if param.Filter <> String.Empty then 
  