anchor.diff:  
   div.row_headings
   {
  -  height: 500px;
  +  height: 700px;
     width:3em;
     border-right:  1px solid black;
   }
  
positive.code: div.sheet_container
  {
    background-color: #DDD;
    height: 520px;
    overflow:  hidden;
  }
  
  
negative.code: 
  div.sheet {
    overflow: auto;
    height: 700px;
    margin: 0px;
  }
  
  