anchor.diff:              | [] -> [ "auto"; "numeric"] 
               | xss -> xss
   
  -        let bench1 = List.contains "bench1" benchmarks 
  -        let bench2 = List.contains "bench2" benchmarks 
  +        let bench1 = List.contains "1" benchmarks 
  +        let bench2 = List.contains "2" benchmarks 
           let auto = List.contains "auto" modes
           let numeric = List.contains "numeric" modes
   
  
positive.code: 
          let benchmarks = 
              match ops.benchmarks with 
              | [] -> ["bench1"; "bench2"] 
              | xss -> xss
  
          let modes = 
  
negative.code:             if couldparse then
                  if reps < minRepetitions then
                      eprintfn "Given value for -r was too small, using the minimum: %i." minRepetitions
                      exit 1
                  else
                      parseArgsRec xss {optionsSoFar with repetitions = reps; changed = true}
              else
                  eprintfn "Option -r was followed by an invalid value."
                  exit 1
          | _ ->
              eprintfn "Option -r needs to be followed by a number."
              exit 1
      | "/vsize"::xs | "-vsize"::xs ->
          match xs with
          | s::xss ->
  