[boost] [xpressive] HEAD doc issue

At the moment, CVS HEAD has this in lib/xpressive/doc/Jamfile.v2: xml xpressive : xpressive.qbk : <dependency>autodoc ; What is the reason for <dependency>autodoc here? I don't think that the target is used during generation of xpressive.xml, and I also believe that this change breaks doc build. With it, running bjam in that dir does not work. Without it works. I think this problem exists since the change was committed on 22 Oct 2006. Comments? - Volodya