commit b6f9f4e3eb051f66fd41ca00d91368e1bc7cb848 introduced backward incompatibility

[behrica]

In dataset.clj before that commit,

the function new-col was re-exported twice, probably by mistake.

tech.ml.dataset/src/tech/v3/dataset.clj

Line 56 in fddeddc

new-column

tech.ml.dataset/src/tech/v3/dataset.clj

Line 213 in fddeddc

new-column)

so the second one "won".

After the change, only the first one stayed, having a different arrity and probably doing something different as well.

So any code using tech.ml.dataset.new-column before b6f9f4e will stop compiling
when moving to b6f9f4e + 1.

 :at [clojure.lang.Compiler$InvokeExpr eval Compiler.java 3711]}
  {:type clojure.lang.ArityException
   :message Wrong number of args (2) passed to: tech.v3.dataset/new-column
   :at [clojure.lang.AFn throwArity AFn.java 429]}]

As this is in the main namespace it might affect some people.

[cnuernber]

Great catch thanks a lot for tracking this down.