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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Revamping sit-for
Date: Tue, 11 Jul 2006 14:16:17 -0400
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      *** `sit-for' called with a negative SECONDS value now forces an
      immediate redisplay even if input is pending.

    is now unnecessary; (sit-for -1) will do exactly the same thing as
    (redisplay t) and the latter is much clearer

    If there are no objections, I'll remove the negative-sit-for behavior,
    and add a note about `redisplay' to NEWS.

Please do.

Would you please also update the Lisp Manual?  Please search for
sit-for in the manual to make sure you find all the places that need
to be changed.