root.html: IE do not like extra ',' in maps

rhodecode/templates/base/root.html

@@ -53,7 +53,7 b''
                 'Show selected change __S': "${_('Show selected change __S')}",
                 'Selection link': "${_('Selection link')}",
                 'collapse diff': "${_('collapse diff')}",
-                'expand diff': "${_('expand diff')}",
+                'expand diff': "${_('expand diff')}"
             };
             var _TM = TRANSLATION_MAP;