fix code typo that didn't compile.
fix code typo that didn't compile.

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