feature 2978: remove useless sprintf in the core

git-svn-id: http://piwigo.org/svn/trunk@25005 68402e56-0260-453c-a942-63ccdbb3a9ee

feed.php

@@ -122,7 +122,7 @@ if (!$image_only)
   if (count($news) > 0)
   {
     $item = new FeedItem();
-    $item->title = sprintf(l10n('New on %s'), format_date($dbnow) );
+    $item->title = l10n('New on %s', format_date($dbnow) );
     $item->link = get_gallery_home_url();
 
     // content creation