@Override
 public String getToolTip(int line, Editor editor) {
   LastRevision revision = myRevisions.get(line);
   if (revision != null) {
     return XmlStringUtil.escapeString(
         revision.getAuthor()
             + " "
             + DateFormatUtil.formatDateTime(revision.getDate())
             + "\n"
             + revision.getMessage());
   }
   return null;
 }