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From: "Eli Zaretskii" <eliz@is.elta.co.il>
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Subject: Re: Latin-1 non breaking space not highlighted
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> Date: Sat, 13 Apr 2002 13:06:22 -0600 (MDT)
> From: Richard Stallman <rms@gnu.org>
> 
> It looks like there is a real problem.  I guess we should not simply
> change show-trailing-whitespace to use the whitespace syntax class.

I see two possible solutions:

  - hardcode a few more special characters, like ISO8859-x NBSP and a
    few Unicode characters;
or
  - use syntax tables for non-ASCII characters only, assuming that no
    Lisp package does anything weird with their syntax class.