bug#15339: 24.3.50; Control characters are displayed as square in describe-char

["Jan Djärv" <jan.h.d@swipnet.se>]

Hi. 

11 sep 2013 kl. 15:28 skrev Xue Fuqiao <xfq.free@gmail.com>:

> To reproduce:
> 
>  emacs -Q
>  C-q C-l
>  C-u C-x =

I'm assuming you go back one character before C-u C-X =. 

I can't reproduce this on a current trunk build. I get "C-l (displayed as C-l)".
That is not correct either, it should be "displayed as ^L".  But it is like that on all platforms. 

Can you try on 24.3 and an updated trunk?  Also try with -nw. 

Thanks,

    Jan D.

> 
> In the *Help* buffer, the ‘decomposition’ property of this character
> (should be itself, I believe) is displayed as a square, but the
> character is displayed right (^L) in the *scratch* buffer.  I also tried
> ^M, ^G, ^H, ^V, and ^[; the results are the same.
> 
> 
> In GNU Emacs 24.3.50.1 (x86_64-apple-darwin12.4.0, NS apple-appkit-1187.39)
> of 2013-09-07 on xfq.local
> Bzr revision: 114163 eggert@cs.ucla.edu-20130907002056-0jom28xr5402rpm9
> Windowing system distributor `Apple', version 10.3.1187
> Configured using:
> `configure --with-ns --enable-checking --disable-silent-rules'
> 
> Important settings:
>  value of $LANG: en_US.UTF-8
>  locale-coding-system: utf-8-unix
>  default enable-multibyte-characters: t
> 
> Major mode: Help
> 
> Minor modes in effect:
>  tooltip-mode: t
>  mouse-wheel-mode: t
>  tool-bar-mode: t
>  menu-bar-mode: t
>  file-name-shadow-mode: t
>  global-font-lock-mode: t
>  font-lock-mode: t
>  blink-cursor-mode: t
>  auto-composition-mode: t
>  auto-encryption-mode: t
>  auto-compression-mode: t
>  buffer-read-only: t
>  line-number-mode: t
>  transient-mark-mode: t
> 
> Recent input:
> C-q C-l C-b C-u C-x = C-x o SPC <escape> x r e - e
> m - b u <tab> <return>
> 
> Recent messages:
> For information about GNU Emacs and the GNU system, type C-h C-a.
> Type C-x 1 to delete the help window, C-M-v to scroll help.
> Char: C-l (12, #o14, #xc) point=192 of 192 (99%) column=0
> 
> Load-path shadows:
> None found.
> 
> Features:
> (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
> mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
> gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
> mail-prsvr mail-utils pp wid-edit cl-loaddefs cl-lib descr-text
> help-mode easymenu time-date tooltip ediff-hook vc-hooks lisp-float-type
> mwheel ns-win tool-bar dnd fontset image regexp-opt fringe
> tabulated-list newcomment lisp-mode prog-mode register page menu-bar
> rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
> facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
> tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
> czech european ethiopic indian cyrillic chinese case-table epa-hook
> jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button
> faces cus-face macroexp files text-properties overlay sha1 md5 base64
> format env code-pages mule custom widget hashtable-print-readable
> backquote make-network-process ns multi-tty emacs)
> 
> 
> -- 
> Best regards, Xue Fuqiao.
> http://www.gnu.org/software/emacs/
> 
>