title: find and replace string in xml but replace string is already present in same xml
body: <p>I have a multiple entry in xml file like below</p>
  
  <pre><code>   &lt;Suggestion keyword="R. 233-32-2" label="R. 233-32-2"/&gt;
     &lt;Suggestion keyword="R. 832-2" label="R.832-2"/&gt;
     .
     . 
     &lt;Suggestion keyword="A. 432-2" label="A.432-2"/&gt;
  </code></pre>
  
  <p>I would like to replace the label value with the keyword value. can someone tell me how can i do it ?</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; 
  &lt;AFS&gt;
      &lt;Suggestions&gt; 
          &lt;Suggestion keyword="D. 1143-8" label="D.1143-8"/&gt; &lt;Suggestion keyword="R. 242-71" label="R.242-71"/&gt; &lt;Suggestion keyword="222-26" label="222-26"/&gt;
          &lt;Suggestion keyword="L. 250-7" label="L.250-7"/&gt; &lt;Suggestion keyword="281 M" label="281 M"/&gt; 
      &lt;/Suggestions&gt; 
  &lt;/AFS&gt;
  </code></pre>