Checking if `allocate` is documented.
Checking if `allocate` is documented.

It apparently is, so I have just improved the description based on the
linked code. Closes #917.

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