anchor.diff:  
   "GenerateSlides"
     ==> "ReleaseSlides"
  -  
  +
   RunTargetOrDefault "KeepRunning"
  
positive.code:     CleanDirs [outDir]
  )
  
  let fsiEvaluator = 
      let evaluator = FSharp.Literate.FsiEvaluator()
      evaluator.EvaluationFailed.Add(fun err -> 
          traceImportant <| sprintf "Evaluating F# snippet failed:\n%s\nThe snippet evaluated:\n%s" err.StdErr err.Text )
      evaluator 
  
  let copyStylesheet() =
      try
  
negative.code: 
      let port = findPort 8083
  
      let serverConfig =
          { defaultConfig with
             homeFolder = Some (FullName outDir)
             bindings = [ HttpBinding.mkSimple HTTP "127.0.0.1" port ]
  