#207947 by Rok Zlender: whitespace missing between error messages in file.inc

includes/file.inc

@@ -560,7 +560,7 @@ function file_save_upload($source, $validators = array(), $dest = FALSE, $replac
         $message .= '<ul><li>'. implode('</li><li>', $errors) .'</li></ul>';
       }
       else {
-        $message .= array_pop($errors);
+        $message .= ' '. array_pop($errors);
       }
       form_set_error($source, $message);
       return 0;