bug#1110: 23.0.60; please provide a hook after ispell-change-dictionary

[zack@upsilon.cc (Stefano Zacchiroli)]

As per subject: please provide a hook to which function can be
registered to execute actions after ispell dictionary gets changed.

FWIW, my use case is in the combination with flyspell. When using
that, if you have a spelled buffer, you want to re-spell it (using
"flyspell-buffer") as soon as you change the dictionary. Having the
required hook would enable doing so in a more clean way wrt advising.


In GNU Emacs 23.0.60.1 (x86_64-pc-linux-gnu, GTK+ Version 2.12.11)
 of 2008-10-05 on elegiac, modified by Debian
 (emacs-snapshot package, version 1:20081005-1)
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--build' 'x86_64-linux-gnu' '--host' 'x86_64-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.0.60/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.0.60/site-lisp:/usr/share/emacs/site-lisp' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=x86_64-linux-gnu' 'host_alias=x86_64-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g -Wl,--as-needed' 'CPPFLAGS=''

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

Major mode: Fundamental

Minor modes in effect:
  iswitchb-mode: t
  show-paren-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
  global-auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
x j x j x j x j d d k o i <return> <backspace> <backspace> 
<return> D o e s SPC t h i s SPC b l i n k g SPC s 
o m e l i <C-backspace> <backspace> <backspace> SPC 
s o m e l i g <backspace> <backspace> <backspace> SPC 
l i g h t ? S-SPC ( O r SPC m a y b e SPC s h o <backspace> 
<backspace> <backspace> e x p l a i n s SPC t h a t 
SPC t <backspace> t h e SPC b u g SPC i s SPC n o t 
SPC a SPC t <backspace> <backspace> t SPC a l l SPC 
r e l a t e d SPC t o SPC i <backspace> V i p e r SPC 
a n d SPC n e e d SPC t o SPC b e SPC l o o k e d SPC 
f o r SPC i n SPC s o m e SPC e m a c s c l i e n t 
SPC d e t a i l ? ) M-q <escape> o <return> T h a n 
k s SPC a SPC l o t ! <return> C h e e r s . <escape> 
g g C-x # y C-h f i s p e l l - c h a <tab> <return> 
<help-echo> <help-echo> <help-echo> <help-echo> <down-mouse-1> 
<mouse-2> M-< C-s i s p e l l - c h a n g e - d i c 
t i o n a r y C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s 
C-s C-s C-s <return> M-< C-x o M-x r e p o <tab> r 
t - e m <tab> <return>

Recent messages:
Mark activated
Save file /tmp/mutt-usha-1000-20151-2? (y or n) 
Wrote /tmp/mutt-usha-1000-20151-2
Type C-x 1 to delete the help window.
uncompressing ispell.el.gz...done
Note: file is write protected
Mark set
Mark saved where search started
Mark set
Making completion list...