Re-added documentation for rakudo/rakudo#1906.
Re-added documentation for rakudo/rakudo#1906.

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