Re: Re: improving bidi documents display

> From: Miles Bader <miles <at> gnu.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>,  eli.osherovich <at> gmail.com,  Michael Welsh Duggan <md5i <at> md5i.com>, 
emacs-bidi <at> gnu.org,  emacs-devel <at> gnu.org
> Date: Wed, 02 Mar 2011 11:39:22 +0900
> 
> "Martin J. Dürst" <duerst <at> it.aoyama.ac.jp> writes:
> >> Overlay, not text property.  The latter modifies the buffer, which is
> >> not what you want in this case.
> >
> > Just a factual question: What does it mean when you say that
> > properties modify the buffer?
> 
> Adding/changing text properties marks the buffer as "modified."
> 
> One can avoid that effect by using the `with-silent-modifications' macro.

Yes, but then copying the text copies the properties with it, which is
not what you want in this case, in general.