Fix: do not add new value

htdocs/core/tpl/admin_extrafields_edit.tpl.php

@@ -99,7 +99,7 @@ if(($type == 'select') || ($type == 'sellist') || ($type == 'checkbox') ||(($typ
 <td>
 <table class="nobordernopadding">
 <tr><td>
-	<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>"><?php echo $param_chain; ?></textarea>
+	<textarea name="param" id="param" cols="80" rows="<?php echo ROWS_4 ?>"><?php echo dol_htmlcleanlastbr($param_chain); ?></textarea>
 </td><td><?php print $form->textwithpicto('', $langs->trans("ExtrafieldParamHelp".$type),1,0)?></td></tr>
 </table>
 </td>