Tidy the `next` function in `designate`.
Tidy the `next` function in `designate`.

Making the initial call to the `next` function in the `designate` in a
separate statement, instead of enclosing it in parenthesis and invoking
the parenthetical clause. Consistant with the rest of code. Less fiddly.

bigeasy/strata,cesarmarinhorj/strata,cesarmarinhorj/strata,bigeasy/strata