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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: The unwarranted scrolling assumption
Date: Sat, 19 Jun 2010 19:07:05 +0300
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Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
To: Lennart Borgman <lennart.borgman@gmail.com>
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> From: Lennart Borgman <lennart.borgman@gmail.com>
> Date: Sat, 19 Jun 2010 16:20:16 +0200
> Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
> 
> Just take the string that is the indentation of the current line and
> put it as text property 'wrap-prefix. I have put that string in
> ind-str-fill and do just this:
> 
>                 (put-text-property beg-pos end-pos 'wrap-prefix ind-str-fill)

And the value of ind-str-fill is the whitespace preceding the first
non-white character of the line?  That is, a string containing blanks
and TABs?