Changes

<tt>\<span></span>( ... \<span></span>)</tt> can also be used as maths delimiters, for instance:

<tt>\<span></span>( \nabla B = \nabla \cdot \vec Q \<span></span>)</tt>

<nowiki><nowiki></nowiki> tags don't escape them unfortunately (but do escape <nowiki><math></nowiki> tags).