Merge from origin/emacs-24

433af0a * lisp/progmodes/python.el (python-shell-buffer-substring): Handle cornercase when region sent starts at point-min.

diff --cc lisp/ChangeLog
Simple merge

diff --cc lisp/progmodes/python.el
Simple merge

diff --cc test/ChangeLog
Simple merge

diff --cc test/automated/python-tests.el
Simple merge