anchor.diff:              <textarea
                 class="form-control text-monospace" name="sequence" id="sequence"
                 rows="10"
  -              autofocus="true"
  +              autofocus
                 spellcheck="false"
                 placeholder="Paste query sequence(s) or drag file containing query sequence(s) in FASTA format here ..." ></textarea>
             </div>
  
positive.code:         </div>
  
          <div
            class="notification"
            id="mixed-sequence-notification"
            style="display: none;">
            <div
  
negative.code:         </div>
  
          <div
            class="notification row"
            id="protein-sequence-notification"
            style="display: none;">
            <div
  