2 spaces triggers the formatting, the rest just get printed: https://news.ycombinator.com/formatdoc

  2 spaces Lorem ipsum dolor sit amet,
  consectetur adipiscing elit, sed do eiusmod
  tempor incididunt ut labore et dolore magna
  aliqua.

    4 spaces Lorem ipsum dolor sit amet,
    consectetur adipiscing elit, sed do eiusmod
    tempor incididunt ut labore et dolore magna
    aliqua.