title: Export to excel not working in jquery datatables when cells contains inverted comma
body: <p>I am using the jquery datatables in which there is an option for export to excel for which i am using the jquery datatable table tools .My table cells contains inverted comma which is creating problem in exporting.How can i resolve this problem as i have tried to manipulate the data using  <strong>fnCellRender</strong></p>
  
  <pre><code>        "fnCellRender": function ( sValue, iColumn, nTr, iDataIndex ) {
                 if ( iColumn === 10) {  
      //here i want to check if string contains the inverted comma ,  
  //if present then how can i escape them so that they appear in excel too.
                      return sValue;
                 }
  </code></pre>