anchor.diff:      | Parallel
       | Debug
       | Filter of hiera:string
  -    | FilterTestList of substring:string
  -    | FilterTestCase of substring:string
  -    | ListTests
  +    | Filter_Test_List of substring:string
  +    | Filter_Test_Case of substring:string
  +    | List_Tests
   
       interface IArgParserTemplate with
         member s.Usage =
  
positive.code:             ignoreMissing = true,
              ignoreUnrecognized = true,
              raiseOnUsage = false)
          let isList = parsed.Contains <@ ListTests @>
          (baseConfig, parsed.GetAllResults()) ||> Seq.fold (flip reduceKnown), isList
  
    let listTests test =
      test
      |> Test.toTestCodeList
      |> Seq.iter (fst3 >> printfn "%s")
  
      0
  
    /// Runs tests with supplied options. Returns 0 if all tests passed, =
    /// otherwise 1
  
negative.code:         | Parallel -> fun o -> { o with parallel = true }
          | Debug -> fun o -> { o with verbosity = LogLevel.Debug }
          | Filter _ -> fun o -> failwith "TODO: PRs much appreciated."
          | Filter_Test_List _ -> fun o -> failwith "TODO: PRs much appreciated."
          | Filter_Test_Case _ -> fun o -> failwith "TODO: PRs much appreciated."
          | List_Tests -> id
  
  
  
  