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From: Eli Zaretskii <eliz@gnu.org>
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Subject: bug#16828: 24.3.50;
	eval-expression, character representation of integer results
	time-consuming
Date: Sun, 26 Mar 2017 17:37:58 +0300
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> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Sun, 26 Mar 2017 10:19:50 -0400
> Cc: Katsumi Yamaoka <yamaoka@jpl.org>, 16828@debbugs.gnu.org
> 
> On Sun, Mar 26, 2017 at 10:13 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > So, under this proposal, is there any way to get the character for a
> > single invocation of M-:, without setting the option, if I only need
> > that sometimes?  Should there be such a way?
> 
> Isn't M-: (prin1-char value) sufficient?

No, not after years of using "M-: #xNNNN RET".