Programming Phoenix LiveView B7: Page 320 typo

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The should update the list of placed pentominoes

The maybe should be That

Returns true if the location a user wants to drop a pentomino in is in fact unoccupied by another pieces.

Pieces should be piece.

Extraneous instructions:

First off, add the following aliases to the pento/lib/pento/game/board.ex module:
alias Pento.Game.{Shape, Pentomino}
This isn’t needed as on page 318 the code listing we were told to enter already includes the equivalent code:

defmodule Pento.Game.Board do
  alias Pento.Game.{Pentomino, Shape}
  defstruct [
    active_pento: nil,
    completed_pentos: [],
    palette: [],
    points: []
  ]