Strings no longer implement IFn

[grayrest]

The docs mention this. I ran across this a few weeks ago but I'm not actively using Mori and forgot about it until the HN post yesterday. Quick patch I've been using for convenience:

(extend-type js/String
  IFn
  (-invoke
    ([s coll]
     (get coll (.toString s)))
    ([s coll not-found]
      (get coll (.toString s) not-found))))

[swannodette]

Strings were never meant to implement IFn, that was a side-effect of the implementation of keywords and symbols. The docs need to be corrected, preferably to demonstrate this behavior with keywords and symbols.