I'm trying to write some filters in clojure from stdin to stdout, but I have 
this nil at the end of the stream, which is what print returns.

As an alternative, I can return strings, but then I have the surrounding "s.

Or I could end by printing (symbol ""), like (do (print "hi")(symbol "")) which 
kind of gives me what I'm looking for but seems to include a newline at the end.

Any other suggestions maybe?

Thanks, Frank.

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