bug in the XQDoc visitor in Zorba

[Sorin Marian Nasoi]

This was reported by Dana:

If inside a module you have a function signature like this:
declare function fn:map($f as function(item()) as item()*, $seq as item()*) as item()* external;

The XQDoc XML resulted is this:
<xqdoc:function arity="2">
  [...]
  <xqdoc:signature>declare function fn:map($f as , $seq as item()*) as item()* external</xqdoc:signature>
</xqdoc:function>

instead of this:
<xqdoc:function arity="2">
  [...]
  <xqdoc:signature>declare function fn:map($f as function(item()) as item()*, $seq as item()*) as item()* external</xqdoc:signature>
</xqdoc:function>

[Sorin Marian Nasoi (sorin.marian.nasoi)]

The actual bug in the XQDoc visitor was fixed in the meantime.

The only remaining issue was in the XQDoc documentation that will be fixed by the attached merge proposal.