Remove details on $*ARGFILES
Remove details on $*ARGFILES

The details can be found in the linked document, "/language/variables",
and from there in the IO::ArgFiles type's document.

MasterDuke17/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,tbrowder/doc,tbrowder/doc