Why does `into` fail when the 2-element collections are lists and not
vectors? :
~~~
user=> (into {} [[:a 1] [:b 2]])
{:a 1, :b 2}
user=> (into {} ['(:a 1) '(:b 2)])
ClassCastException clojure.lang.Keyword cannot be cast to
java.util.Map$Entry clojure.lang.ATransientMap.conj (ATransientMap.java:44)
~~~
or even:
~~~
user=> (conj {} [:a 1])
{:a 1}
user=> (conj {} '(:a 1))
ClassCastException clojure.lang.Keyword cannot be cast to
java.util.Map$Entry clojure.lang.APersistentMap.cons
(APersistentMap.java:42)
~~~
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