anchor.diff:      | Amend
       | [<AltCommandLine("-p")>] Patch
       | [<AltCommandLine("-m")>] Message of msg:string
  -with
  +
       interface IArgParserTemplate with
           member this.Usage =
               match this with
  
positive.code: Check out the [samples](https://github.com/fsprojects/Argu/tree/master/samples) 
  folder for CLI implementations that use Argu.
  
  *)
negative.code:     | Port of tcp_port:int
      | Log_Level of level:int
      | Detach
  
      interface IArgParserTemplate with
          member s.Usage =
              match s with
  