anchor.diff:          let value = Option.None<int>()
           let expected = "42"
           let mutable result = ""
  -        Option.DoWhenNone(value, (fun x -> result <- expected.ToString())) |> should equal value
  +        Option.DoWhenNone(value, (fun _ -> result <- expected.ToString())) |> should equal value
           result |> should equal expected
   
   module Collections =
  
positive.code:         let value = Option.Some(42)
          let expected = "test"
          let mutable result = expected
          Option.DoWhenNone(value, (fun x -> result <- "fail")) |> should equal value
          result |> should equal expected
  
      [<Fact>]
  
negative.code:         let value = Option.Some(42)
          let expected = "42"
          let mutable result = ""
          Option.Do(value, (fun _ -> result <- expected.ToString())) |> should equal value
          result |> should equal expected
  
      [<Fact>]
  