anchor.diff:        }
         testAsync "int error" {
             testArgs [|"--fscheck-end-size";"1.2"|]
  -            (Result.Error ["--fscheck-end-size cannot parse parameter '1.2'"])
  +            (Result.Error ["--fscheck-end-size Cannot parse parameter '1.2'"])
         }
         testAsync "float" {
             testArgs [|"--stress-memory-limit";"3"|]
  
positive.code:       testAsync "three errors" {
          testArgs [|"--fscheck-start-size";"bb";"one";"--filter"|]
            (Result.Error [
              "--fscheck-start-size cannot parse parameter 'bb'"
              "--filter requires a parameter"
              "unknown options: one"
            ])
  
negative.code: let expecto =
  
    let testArgs i o = Expect.equal (Args.parseOptions options i) o "testArgs"
  
    testList "expecto" [
      testList "Setup & teardown 2" [
        // just demoing how you can use a higher-order function as setup/teardown
  