Pre: flatten the representation of VALUES.
Pre: flatten the representation of VALUES.

A single vec that's traversed in chunks is more efficient than multiple
vecs… and this ensures that each sub-vec is the same size.

ncalexan/mentat,mozilla/mentat,ncalexan/mentat,mozilla/mentat,ncalexan/mentat,mozilla/mentat,mozilla/mentat,ncalexan/mentat,ncalexan/datomish,mozilla/mentat,ncalexan/mentat,ncalexan/datomish,mozilla/mentat,ncalexan/mentat