.ace_editor { 
  height: 150px;
  position: relative;
  border-top: 40px;
  border: 1px solid #DDD;
  border-radius: 4px;
  border-bottom-right-radius: 0px;
  margin-top: 10px;
}

/* Source: http://snipplr.com/view/10979/css-cross-browser-word-wrap */
div.wordwrap { 
   white-space: pre-wrap;      /* CSS3 */   
   white-space: -moz-pre-wrap; /* Firefox */    
   white-space: -pre-wrap;     /* Opera <7 */   
   white-space: -o-pre-wrap;   /* Opera 7 */    
   word-wrap: break-word;      /* IE */
}