redisplay-dont-pause does not work

[David Kastrup]

I am checking for factual correctness of display.texi at the moment.
It says:


      You can request a display update, but only if no input is pending,
    with @code{(sit-for 0)}.  To force a display update even when input is
    pending, do this:

    @example
    (let ((redisplay-dont-pause t))
      (sit-for 0))
    @end example

However, if I do

M-: (progn (redraw-display) (let ((redisplay-dont-pause t)) (sleep-for
1) (sit-for 0) (sleep-for 5))) RET

and press C-n within 1 second, then no redisplay occurs for the whole
duration of 6 seconds.  This is on

GNU Emacs 22.0.50.36 (i686-pc-linux-gnu, GTK+ Version 2.8.17) of 2006-05-24 on 
lola

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum