anchor.diff:          match key with
           | "grid" -> 
               value :?> JArray
  -            |> normalizeJArray
               |> Seq.map formatValue
               |> formatMultiLineList
           | _ -> 
  
positive.code: type Allergies() =
      inherit GeneratorExercise()
  
      let toAllergen (jToken: JToken) =  sprintf "Allergen.%s" (jToken.ToString() |> String.dehumanize)
  
      let renderAllergicToAssert canonicalDataCase (jToken: JToken) =
          let substance = jToken.["substance"] |> toAllergen
          let score = canonicalDataCase.Input.["score"] :?> int64
          let sut = sprintf "allergicTo %d %s" score substance
          let expected = jToken.Value<bool>("result") |> formatBool
  
negative.code:     inherit GeneratorExercise()
  
      override __.RenderExpected (_, _, value) =
          value :?> JArray
          |> Seq.map formatValue
          |> formatList
  
  