anchor.diff:  /// by the older 'fsyacc' tool from the F# PowerPack.
   [<RequireQualifiedAccess>]
   module private FsYacc =
  +    open System.CodeDom.Compiler
       open Graham.LR
  +    open BackendUtils.CodeGen
   
       //
       let [<Literal>] private defaultLexingNamespace = "Microsoft.FSharp.Text.Lexing"
  
positive.code:                     options
  
              // Generate the code and write it to the specified file.
              using (File.CreateText fsyaccOptions.OutputPath) (FsYacc.emit (processedSpec, parserTable))
  
  
negative.code: 
  namespace FSharpYacc.Plugin
  
  open System.ComponentModel.Composition
  open System.IO
  //open System.Text
  open LanguagePrimitives
  open FSharpYacc
  open FSharpYacc.Ast
  