Document Date.clone takes a :formatter arg
Document Date.clone takes a :formatter arg

Rakudo impl: https://github.com/rakudo/rakudo/commit/a9a161aef4
Tests: https://github.com/perl6/roast/commit/f304b9910a
antquinonez/doc,stmuk/doc,tbrowder/doc,MasterDuke17/doc,stmuk/doc,dmaestro/doc,antquinonez/doc,MasterDuke17/doc,gfldex/doc,perl6/doc,stmuk/doc,jonathanstowe/doc,gfldex/doc,antquinonez/doc,jonathanstowe/doc,jonathanstowe/doc,tbrowder/doc,stmuk/doc,dmaestro/doc,MasterDuke17/doc,perl6/doc,jonathanstowe/doc,gfldex/doc,antquinonez/doc,gfldex/doc,jonathanstowe/doc,dmaestro/doc,dmaestro/doc,dmaestro/doc,tbrowder/doc,tbrowder/doc,MasterDuke17/doc,antquinonez/doc,gfldex/doc,perl6/doc,perl6/doc,perl6/doc,stmuk/doc