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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Spreadsheet display mode
Date: Sat, 24 Nov 2007 10:20:51 -0500
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Xref: news.gmane.org gmane.emacs.devel:84058
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    The manual is not explicit about the difference between
    (info "(elisp) Refresh Screen") and
    (info "(elisp) Forcing Redisplay")

I will clear that up.

    It's not clear why (redisplay t) shouldn't work

	If the optional argument FORCE is non-`nil', it forces an immediate
	and complete redisplay even if input is available.

This causes redisplay _now_.  `force-window-update'
causes a certain window to be redisplayed in full
whenever redisplay happens.