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buffered output and prompting
At one point, there was a prompting function in the Common Lisp
spec. This is another thing that was flushed due to controversiality.
Most people won't dispute that some sort of prompting capability is
useful; the problem is deciding what to provide and how. If you have
a proposal, speak up.
In my message, I was pointing out that it is possible to use OS
prompting features without having a language prompt notion.
Regardless of the desirability of a prompting function, you should
probably support users printing their own prompts.