Fix incorrect signatures for .keys, .values, .kv and pairs. Brian.d.Foy++
Fix incorrect signatures for .keys, .values, .kv and pairs. Brian.d.Foy++

Closes #1323

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