Update documentation for update function.
res)
(defn update
- "Accepts a key argument and passes its' associated value to a function.
- The key then, is associated to the function's return value"
+ "Accepts a key argument and passes its associated value to a function.
+ The key is the re-associated to the function's return value. Returns the updated
+ data structure ds."
[ds key func & args]
(def old (get ds key))
(set (ds key) (func old ;args)))
