[plt-scheme] MzScheme and read-line

This happens because the REPL will read one expression, so the newline
that follows it is still in the input buffer.



eswenson wrote:
> Invoking (read-line) in DrScheme behaves as I would expect -- it
> doesn't return until a newline is read.  However, invoking (read-line)
> in MzScheme (on Win7) return "\r" immediately without waiting for any
> input.  I've tried this before and after loading the GNU readline
> support with no change in behavior.  I have verified that the current
> port is a terminal port in the interactive session and I've tried
> starting MzScheme with and without "-i".  Thanks.
>
> -- Eric
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