refs #20945 [finc] RecordViewHelper: remove invalid new line from link templates in getLink

* TODO PR / refactoring of link templates

module/finc/src/finc/View/Helper/Root/Record.php

@@ -197,7 +197,8 @@ class Record extends \VuFind\View\Helper\Root\Record
             $type == 'author'
                 ? $this->removeAuthorDates($lookfor) : $lookfor
         );
-        return parent::getLink($type, $lookfor);
+        /* remove invalid new line in link templates, remove after fixed in templates or VuFind parent */
+        return str_replace(["\n"], '', parent::getLink($type, $lookfor) ?? '');
     }
 
     /**