[doc] @defun arguments

[Jesper Harder]

Texinfo 4.6.

In "(texinfo)Functions Commands" the manual says:

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

But the arguments aren't uppercased like @var in Info output.  I like
the way it currently works better than what the manual says, by the
way.

(And to nitpick: the face used in TeX looks more like slanted than
italics).

-- 
Cheers,
Jesper Harder