for macro spec should know :let can't go in the first position

Question

The {{for}} macro does not support {{:let}} in the first position. This was reported in CLJ-207 and a patch was produced but rejected. Since we have spec for macros now, it might be an opportunity to provide a better error message. (I think first-place let should be fine, but that's neither here nor there.)

Answer 1

Reference: https://clojure.atlassian.net/browse/CLJ-2081 (reported by lvh)