message: examples: tidy up snap demo code
diff: -/*
  - * Copyright (c) 2013 Taye Adeyemi
  - * Open source under the MIT License.
  - * https://raw.github.com/taye/interact.js/master/LICENSE
  - */
  -
  -(function (interact) {
  -
  -
  let canvas,
  context,
  guidesCanvas,
  window.grid = {
  drawGrid: drawGrid,
  };
  -
  -}(window.interact));
  