anchor.diff:          parseChars rf cs
   
       /// Parses and post-processes a file at the given path.
  -    let parseFile rf inputFile =
  -        use s = File.OpenText(inputFile)
  +    let parseFile rf path =
  +        use s = File.OpenText(path)
           parseTextReader rf s
   
       /// Parses and post-processes a string.
  
positive.code:     /// <returns>An F# result type containing either the
      /// post-processed return type, or a type describing
      /// what did wrong and where.</returns>
      /// <remarks>The text reader's content will be lazily read</remarks>
      [<MethodImpl(MethodImplOptions.AggressiveInlining)>]
      member this.Parse textReader = parseTextReader this textReader
      /// <summary>Changes the <see cref="PostProcessor"/> of this runtime Farkle.</summary>
  
negative.code:     /// processor changed to <paramref name="pp"/>.</returns>
      [<MethodImpl(MethodImplOptions.AggressiveInlining)>]
      member this.ChangePostProcessor pp = changePostProcessor pp this
      /// <summary>Parses and post-processes a file.</summary>
      /// <param name="path">The path of the file to parse.</param>
      /// <returns>An F# result type containing either the
      /// post-processed return type, or a type describing
      /// what did wrong and where.</returns>
      /// <remarks>The file's content will be lazily read.</remarks>
      [<MethodImpl(MethodImplOptions.AggressiveInlining)>]
      member this.ParseFile path = parseFile this path
      /// <summary>Changes the <see cref="PostProcessor"/> of this runtime Farkle to
      /// a dummy one that is useful for syntax-checking, not parsing.</summary>
      [<MethodImpl(MethodImplOptions.AggressiveInlining)>]
  