Use 'different from' in preference to 'different to'
(defn keep
``Given a predicate `pred`, return a new array containing the truthy results
of applying `pred` to each element in the indexed collection `ind`. This is
- different to `filter` which returns an array of the original elements where
+ different from `filter` which returns an array of the original elements where
the predicate is truthy.``
[pred ind]
(def res @[])
