bug#8514: 23.3; ns-right-alternate-modifier doesn't work well with shift key

[Christos Chryssochoidis]

If I (setq ns-right-alternate-modifier nil), so that I can insert
accented characters with it and other special characters on my Mac, the right
Alt(alternate) key generally works as expected, except for one case; if I
simultaneously press some of the Shift keys. Then the right Alt
("Option") key is ignored and only the Shift key is taken into
account. This isn't observed with the left Alt ("Option") key: if I
(setq ns-alternate-modifier nil), then the left Alt key works correctly
both with the Shift keys and without them. But this isn't the case with
ns-right-alternate-modifier key (right Alt/Option).




In GNU Emacs 23.3.1 (x86_64-apple-darwin10.7.0, NS apple-appkit-1038.35)
 of 2011-04-17 on Christos-Mac.local
Windowing system distributor `Apple', version 10.3.1038
configured using `configure  '--with-ns' 'CFLAGS=-g''

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: nil
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8
  default enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  global-linum-mode: t
  delete-selection-mode: t
  display-time-mode: t
  recentf-mode: t
  show-paren-mode: t
  global-ede-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  transient-mark-mode: t

Recent input:
<menu-bar> <help-menu> <send-emacs-bug-report> <help-echo>
n s - r i g h t - a l t e r n a t e - m o d i f i e
r SPC d <backspace> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> SPC d o e s
n ' t SPC w o r k SPC w i t h SPC s h i f t SPC k e
y C-g C-x b b l a <return> Ο Ο Ο Ο Ο ο ο ο ο ο ο Ο
Ι ι ϛ ϛ ϛ ϛ ϛ ϛ Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο
Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο C-x C-g C-g <menu-bar> <help-menu>
<send-emacs-bug-report>

Recent messages:
Loading /Users/christos/.recentf...done
Cleaning up the recentf list...done (0 removed)
Loading time...done
Loading /Users/christos/elisp/keyboard-meta-command.el (source)...done
Loading /Users/christos/.emacs.d/filesets-cache.el (source)...done
Loading /Users/christos/elisp/org-custom.el (source)...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Quit
Quit

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Features:
(shadow sort mail-extr message ecomplete rfc822 mml mml-sec
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rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util netrc
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tree-widget paren ede/linux ede/emacs ede/cpp-root ede/speedbar
ede/files ede ede/base ede/auto ede/source eieio-base eieio-speedbar
speedbar sb-image ezimage dframe assoc eieio-custom wid-edit eieio
byte-opt bytecomp byte-compile cedet tooltip ediff-hook vc-hooks
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lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar
mldrag mouse jit-lock font-lock syntax facemenu font-core frame cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
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indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple
abbrev loaddefs button minibuffer faces cus-face files text-properties
overlay md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process ns multi-tty
emacs)