html / emacs / email / gnus: 0xa0 classified as "whitespace" but not treated as whitespace

[Daniel Ortmann <dortmann@lsil.com>]

Correction, 0xa0 should actually be treated as whitespace but is not.
I.e. fill-paragraph and friends don't treat it as whitespace:

Here is what describe-char-after says:

--------------------------------
  character:   (04240, 2208, 0x8a0)
    charset: latin-iso8859-1 (Right-Hand Part of Latin Alphabet 1 (ISO/IEC 8859-1): ISO-IR-100)
 code point: 32
     syntax: whitespace
   category:  :This character counts as a space for indentation purposes.   l:Latin  
buffer code: 0x81 0xA0
  file code: not encodable by coding system nil
       font: -Misc-Fixed-Medium-R-SemiCondensed--13-120-75-75-C-60-ISO8859-1
--------------------------------

I use the following routine to fix them up:

(defun 0xa0-clean () (interactive)
  (query-replace-regexp "\240" " "))

Any hint as to where the problem might be?  I suspect it's a simple fix.


Daniel Ortmann <dortmann@lsil.com> writes:

> Lars Magne Ingebrigtsen <larsi@gnus.org> writes:
> 
> > Daniel Ortmann <dortmann@lsil.com> writes:
> > 
> > > Many emails are now using 0xa0 as a newline character (at least as
> > > rendered by w3 under gnus and as sent by messages using "R" for
> > > Reply).  Often the normal newline 0x0a occurs above and below the
> > > 0xa0 line.
> > 
> > That sounds odd.  0xa0 is non-breaking space, which doesn't have
> > anything to do with newlines.
> > 
> > However, it's not uncommon for message (especially HTML, for some
> > reason) to have non-breaking space in them.  So of you respond to such
> > an article, they'll be quoted just like any other character.
> 
> Well, I am not seeing 0xa0's "quoted", but I *am* seeing them treated as
> blank lines.
> 
> Note that I have "url" and "w3" installed.  Perhaps the problem lies there?

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