Rewrites examples and changes def of head, refs #2631
Rewrites examples and changes def of head, refs #2631

tbrowder/doc,MasterDuke17/doc,perl6/doc,perl6/doc,MasterDuke17/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,perl6/doc,perl6/doc,perl6/doc,tbrowder/doc,tbrowder/doc