Is there some way to include control characters in a Show string so that they take effect when the element is Shown?

For example, if I define a String "a\nb" and use putStrLn on it, the \n causes a return, but when I simply return the string from a function, the \n is shown as \n.  Is there a way to get the \n to execute when it's embedded in a returned value?

Thanks

-- Russ Abbott
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  Professor, Computer Science
  California State University, Los Angeles

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