Add note about using `--hint`.
Add note about using `--hint`.

[ci skip]

MichielDerhaeg/stack,Fuuzetsu/stack,juhp/stack,mrkkrp/stack,martin-kolinek/stack,MichielDerhaeg/stack,anton-dessiatov/stack,deech/stack,anton-dessiatov/stack,mrkkrp/stack,juhp/stack,deech/stack,AndreasPK/stack,martin-kolinek/stack,AndreasPK/stack,Fuuzetsu/stack