Oops! Obviously, it was my blunder.
String.replace/4 is a different function than Regex.replace/4.
However, while I was searching for an answer I bump upon this suggestion Joe Armstrong on X: "#eliixir How about |N> meaning inject in to the N'th arg of the next function? |> is short hand for |1> (|N> is "joes" operator :-)" / X
