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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: bug#24672: writing a test for Bug#24672 (viper mode malfunction
	while inserting a paren in continued cpp directive)
Date: Wed, 26 Oct 2016 14:52:16 +0300
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	<CA+8g5KGMrDHWQywkP-OsZoEVEVreWHTOwajFjVeB4ugeu-6pog@mail.gmail.com>
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To: Jim Meyering <jim@meyering.net>
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	(message from Jim Meyering on Tue, 25 Oct 2016 22:09:40 -0700)
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> From: Jim Meyering <jim@meyering.net>
> Date: Tue, 25 Oct 2016 22:09:40 -0700
> 
> This is a corner case.
> When I start in viper mode with this file contents:
> 
>   #define z_b\
> 
> and then change the "z" to a parenthesis (either one), I get this:
> 
>   #define (z_b^I^I^I^I^I\$
> 
> [I have represented each TAB as "^I", of course]
> Rather surprising to see all of those TAB characters inserted.

I replied on the bug list; please don't cross-post here.