:sort-require seemingly incompatible with "ns" in fn-map

When I have an entry for `"ns"` in my `:fn-map`, it seems that `:style :sort-require` no longer takes effect: ``` ➜ cat /tmp/foo.clj (ns foo (:require [z :refer :all] [a :refer :all])) ➜ ../zprint/zprintm '{:style :sort-require}' < /tmp/foo.clj (ns foo (:require [a :refer :all] [z :refer :all])) ➜ ../zprint/zprintm '{:style :sort-require :fn-map {"ns" [:arg1-body {:width 250}]}}' < /tmp/foo.clj (ns foo (:require [z :refer :all] [a :refer :all])) ➜ ../zprint/zprintm '{:style :sort-require :fn-map {"ns" [:arg1-body {:width 250 :style :sort-require}]}}' < /tmp/foo.clj (ns foo (:require [z :refer :all] [a :refer :all])) ```