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bug#1727: 23.0.60; char syntax for non-breaking space


From: Richard M Stallman
Subject: bug#1727: 23.0.60; char syntax for non-breaking space
Date: Mon, 29 Dec 2008 05:23:31 -0500

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the address@hidden mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

When I type C-x = at a non-breaking space, it tells me that it
has code 160, hex a0.  But when I execute (insert "\xa0"),
it inserts something that displays as `\240' and for which C-x =
displays this:

   Char:   (4194208, #o17777640, #x3fffa0, raw-byte) point=198 of 211 (93%) 
column=5

Is that a bug?  It seems quite confusing to me.
I am unable to figure out what I should write in Lisp code
to represent non-breaking space.  This isn't documented.

Perhaps \N should give non-breaking space.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/home/rms/emacs-cvs/etc/DEBUG for instructions.


In GNU Emacs 23.0.60.15 (mipsel-unknown-linux-gnu, GTK+ Version 2.12.11)
 of 2008-12-22 on lemote-yeeloong
configured using `configure  'CFLAGS=-O0 -g -Wno-pointer-sign' 
'mipsel-unknown-linux-gnu' 'build_alias=mipsel-unknown-linux-gnu' 
'host_alias=mipsel-unknown-linux-gnu' 'target_alias=mipsel-unknown-linux-gnu''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Mail

Minor modes in effect:
  gpm-mouse-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
SPC C-y C-x C-x " C-e " ESC b ESC b ESC f C-f C-f [ 
. ] C-e ) RET C-a C-u C-p ESC f ESC f ESC f ESC f ESC 
f ESC f C-f ESC f C-f C-x = C-x b RET C-x b RET C-a 
ESC : ESC p ESC f ESC f ESC f ESC f DEL DEL DEL x a 
0 C-e RET C-x C-g ESC : ESC p C-k C-y C-g C-x b * s 
c TAB RET C-n C-u C-y C-f ESC d ESC d ESC d i n s e 
r t C-e C-a C-k ESC : C-y RET C-h i m e m a c s ESC 
DEL e l i s p RET m t r i n g ESC DEL l i s p SPC d 
a t RET m s t r i n g SPC t y DEL DEL DEL TAB C-g C-v 
m e d i t ESC DEL p r o g r TAB RET C-u C-n C-u C-n 
C-u C-n C-n RET C-u C-u C-n C-u C-n C-u C-n C-n C-n 
RET C-v p SPC SPC SPC C-x b RET C-n ESC SPC DEL \ DEL 
C-x b P TAB RET C-p C-p C-p ESC b C-b C-b C-x = C-x 
b RET C-q 2 4 0 RET C-p C-e C-b C-b C-x = C-n C-a C-x 
= C-n ESC : ESC p C-g C-x 4 m e m a c s - d e ESC DEL 
ESC DEL e m a c s - o r e t e s t ESC b C-d o ESC x 
r e p o r t SPC e a DEL m n a c DEL DEL DEL a c s SPC 
TAB \ DEL RET

Recent messages:
Char:   (160, #o240, #xa0, file ...) point=1554 of 2188 (71%) column=39
1848 (#o3470, #x738)
Quit
Mark set
nil
Composing main Info directory...done
Quit
Char:   (160, #o240, #xa0, file ...) point=1628 of 2188 (74%) column=47
Char:   (4194208, #o17777640, #x3fffa0, raw-byte) point=198 of 201 (98%) 
column=5
Char:   (160, #o240, #xa0, file ...) point=201 of 201 (100%) column=0
Quit






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