some WS and program roles

docs/en/programmers/plugins/plugins-modifiers.xml

@@ -89,9 +89,10 @@ function smarty_modifier_truncate($string, $length = 80, $etc = '...',
 }
 ?>
 ]]>
-</programlisting>
+     </programlisting>
     </example>
-</sect1>
+   </sect1>
+
 <!-- Keep this comment at the end of the file
 Local variables:
 mode: sgml
@@ -111,4 +112,4 @@ End:
 vim600: syn=xml fen fdm=syntax fdl=2 si
 vim: et tw=78 syn=sgml
 vi: ts=1 sw=1
--->
+-->