docs: def _smudge_bytes(target, offset, magic_bytes):
      """
          Write magic bytes to a file relative from
          offset
      """
      click.echo('Writing {c} magic byes at position {offset} on file {file}'.format(
          c=len(magic_bytes), offset=offset, file=target))
  
      with open(target, 'r+b') as f:
          f.seek(offset)
          f.write(magic_bytes)
          f.flush()
  
      click.echo('Changes written')