<===> input.scss
@media screen and (orientation:landscape) {
  span {
    background: blue;
  }
  /* fudge */
  // @include foo;
  /* budge */
  div {
    color: red;
  }
}

@mixin testComments {
  /* crash */
  p {
    width: 100px;
  }
}

@media screen and (orientation:landscape) {
  @include testComments;
}
<===> output.css
@media screen and (orientation: landscape) {
  span {
    background: blue;
  }

  /* fudge */
  /* budge */
  div {
    color: red;
  }
}
@media screen and (orientation: landscape) {
  /* crash */
  p {
    width: 100px;
  }
}