anchor.diff:      | String of string
   
   /// What can go wrong with reading an EGT file.
  -type EGTError =
  +type EGTReadError =
       /// A [sequence error](Farkle.SeqError) did happen.
       | SeqError of SeqError
       /// Boolean values should only be `0` or `1`.
  
positive.code:     /// Valid entry codes are these letters: `EbBIS`.
      | InvalidEntryCode of char
      /// An entry of `expected` type was requested, but `found` was returned instead.
      | InvalidEntryType of expected: string * found: EGTEntry
  
  module EgtReader =
      let byteToChar = (*) 1uy >> char
  
negative.code:     | Property = 112uy
      | Counts = 116uy
  
  type Entry =
      | Empty
      | Byte of byte
      | Boolean of bool
  