IO::Path: restructure the file test operator section.
IO::Path: restructure the file test operator section.

Update examples, reference .path.

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