indenting whitelines and zombielines

css_general_2.css

/* -- BAD -- */
#identifier {
key: value;
#anotheridentifier {
key: value;
}
}

#identifier {
  key: value;
  #anotheridentifier {
    key: value;
  }
}

#identifier {
  key: value;
  #anotheridentifier {
    key: value;
  }

}

/* -- GOOD -- */
#identifier {
  key: value;
  
  #anotheridentifier {
    key: value;
  }
}

#identifier {
  key: value;
  
  #anotheridentifier {
    key: value;
  }
}