buffered output and prompting

[Rob MacLachlan <RAM@C.CS.CMU.EDU>]

    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.

 Rob