inserting spaces between nodes in XML::XPath

I have a need to pass data from an XML document to an index engine.  I'm 
using XML::XPath.

The call is in the form (where $div is populated with a get_nodelist):
    my $fulltext = $div->string_value;

This works generally well.  The challenge comes from:
<div> 
    bunch of stuff
    <table>
       <row>
          <cell>text</cell><cell>text</cell>
     </row>
    </table>
    more stuff
</div>
with the table contents returning as texttext. 

Given that I don't want to manipulate all the tables in all the 
documents that may ever be touched by this transformation, what are my 
options for wrapping white-space around the contents of the <cell> 
elements to keep them from blending into the next value?

Walter Lewis
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