Fix up &gist
Fix up &gist

- Use correct signature
- Mention say on Str types doesn't use gist

stmuk/doc,perl6/doc,antquinonez/doc,stmuk/doc,jonathanstowe/doc,MasterDuke17/doc,perl6/doc,dmaestro/doc,MasterDuke17/doc,dmaestro/doc,dmaestro/doc,MasterDuke17/doc,dmaestro/doc,tbrowder/doc,gfldex/doc,perl6/doc,antquinonez/doc,stmuk/doc,jonathanstowe/doc,jonathanstowe/doc,perl6/doc,gfldex/doc,tbrowder/doc,MasterDuke17/doc,gfldex/doc,antquinonez/doc,perl6/doc,antquinonez/doc,tbrowder/doc,stmuk/doc,tbrowder/doc,gfldex/doc,stmuk/doc,gfldex/doc,jonathanstowe/doc,jonathanstowe/doc,dmaestro/doc,antquinonez/doc