anchor.diff:      let result = Nav.openPath fs storedLocation SelectNone model
   
       // Assert
  -    let resultModel = expectOk "Failed to open path" result
  +    let resultModel = assertOk result
       resultModel.Sort |> shouldEqual (Some expected)
   
   [<Test>]
  
positive.code:         file "readme.md"
      ]
  
  let expectOk onError = function
      | Error _ -> failwith onError
      | Ok result -> result
  
  [<Test>]
  let ``Use stored sort on path change`` () =
      // Arrange
  
negative.code:     let result = Nav.openPath fs newLocation SelectNone model
  
      // Assert
      let resultModel = assertOk result
      resultModel.Sort |> shouldEqual (Some expected)
  
  