Fix potx warning.

(cherry picked from commit 62cb91318ddbf045a98b55bd02682b0320cf0ccc)

gmap_settings_ui.inc

@@ -465,7 +465,7 @@ function gmap_admin_settings(&$form_state) {
   $form['gmap_markermanager']['clusterer'] = array(
     '#type' => 'fieldset',
     '#title' => t('Clusterer settings'),
-    '#description' => t("Clusterer is a marker manager written by Jef Poskanzer of acme.com. To use, you must place Clusterer2.js (available ".'<a href="@url">here</a>) into the "thirdparty" folder.', array('@url' => 'http://acme.com/javascript/Clusterer2.js')),
+    '#description' => t('Clusterer is a marker manager written by Jef Poskanzer of acme.com. To use, you must place Clusterer2.js (available <a href="@url">here</a>) into the "thirdparty" folder.', array('@url' => 'http://acme.com/javascript/Clusterer2.js')),
     '#collapsible' => TRUE,
     '#collapsed' => TRUE,
   );