anchor.diff:  open System
   open System.IO
   open System.Collections.Generic
  +
   
   [<RequireQualifiedAccess>]
   module internal Dictionary =
  
positive.code:         |> Seq.map (|KeyValue|)
          |> Map.ofSeq
      Map.tryFind key thisMap
  
  
  module internal Token =
  
negative.code:     | Minus
      | LessThan
      | Multiply
      | Equal
  
      member op.Code =
        match op with
  