Update signature to match that of the list variant.
Update signature to match that of the list variant.

Closes #1604

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