Re: [doc] @defun arguments

[Karl Berry]

      The argument names on the address@hidden' line automatically appear in
      italics or upper case as if they were enclosed in address@hidden'.

Thanks very much.  I've modified the defn descriptions some more to try
to more closely match the reality.  (Sadly, those nodes could use quite
a bit more work.  At least, I find them hard to follow ...)