anchor.diff:              | _ -> loop (a + b) a (c - 1)
           loop 1 0 n
   
  -    ///reverse list funciton
  +    ///reverse list functiton
       let reverse list =
           let rec loop list revList =
               match list with
  
positive.code:     /// factorial
      let rec fact n =
          match n with
          | 0 -> 1
          | _ -> n * fact (n - 1)
  
      /// fibonacci
  
negative.code: 
      [<Test>]
      let ``factorialTest`` () = (fact 5) |> should equal 120
  
      [<Test>]
      let ``fibonacciTest`` () = (fib 5) |> should equal 5
  
      [<Test>]
      let ``reverseListTest`` () = (reverse [1; 2; 3]) |> should equal [3; 2; 1]
  
      [<Test>]
      let ``listMakerTest`` () = (listMaker 2 3) |> should equal [4; 8; 16; 32]