New rule: Complement to style/trivial-for

[NoahTheDuke]

There's style/trivial-for which checks if a symbol is used as a function in a simple for loop: (for [item items] (f item)), but there are cases where a for loop is more readable, such as when building a sequence of new objects by iterating over a collection:

; Don't
(map #(hash-map :a % :b 2 :c 3) coll)

; Do
(for [item coll] {:a item :b 2 :c 3})

Can apply to hash-set and array-map and vector and others as I think of them.

[NoahTheDuke]

Implemented in 5be04c7