Subject: 23.2; partial-completion-mode suffix and completions buffer
From: Kevin Ryde <[email-masked]>
To: [email-masked]
Date: Thu, 14 Oct 2010 11:30:58 +1100
List-Id: <debbugs-submit.debbugs.gnu.org>

In partial completion mode, if the choices have a common suffix, then
selecting an entry from the *Completions* buffer returns a string which
is not that choice.  For example

    (completing-read "enter: " '(("xx-aa" . "")
                                 ("yy-aa" . "")))

    type "-aa"
    press Tab
    M-v to go to *Completions* buffer
    Ret to choose "xx-aa"
    => return value "xx-aa-aa"

where I hoped the return would be "xx-aa".

In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
 of 2010-05-16 on raven, modified by Debian
configured using `configure  '--build' 'i486-linux-gnu' '--build' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''

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_AU
  value of $XMODIFIERS: nil
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t