Makes distinction between "gist" and "stringification"
Makes distinction between "gist" and "stringification"

Also some reflow and grammar changes. This would close #2545.

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