[XHTMLMOD] Remove SUB around trademark sign

Change:

  <h1><a name="title" id="title"></a> Modularization of 
XHTML<sup>™</sup> 1.0 - Second Edition</h1>

To:

  <h1><a name="title" id="title"></a> Modularization of XHTML™ 1.0 - 
Second Edition</h1>


-- 
  Anne van Kesteren
  <http://annevankesteren.nl/>