div#test {
  /* comment for div */
  color: green;
  p {
    /* comment for div p */
    color: red;
    b { color: blue; }
  }
}  


-----

div#test {
  /* comment for div */
  color: green;
}
div#test p {
  /* comment for div p */
  color: red;
}
div#test p b { color: blue; }