23.0.60; python.el: auto-indentation doesn't work with continuation lines

[Torsten Bronger <bronger@physik.rwth-aachen.de>]

When I use a continuation line (either by parenthesis or by backslash) in a
Python program, the following, non-continuated line is erroneous indented.  For
example,

def open_file():
    file_ = open("file.txt",
                 "r")

makes <TAB> jump between column 0 and 17, although 4 would be correct.


In GNU Emacs 23.0.60.2 (x86_64-unknown-linux-gnu)
 of 2008-04-20 on wilson
Windowing system distributor `The Cygwin/X Project', version 11.0.60899901
configured using `configure  '--prefix=/usr/local/' '--mandir=/usr/local/share/man/' '--infodir=/usr/local/share/info/' '--with-x-toolkit=no' '--with-xpm' '--with-jpeg' '--with-tiff' '--with-gif' '--with-png' '--with-x''

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

Major mode: Emacs-Lisp

Minor modes in effect:
  global-auto-revert-mode: t
  savehist-mode: t
  display-time-mode: t
  desktop-save-mode: t
  mouse-wheel-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-compression-mode: t
  line-number-mode: t