Treat interpreter-mode-alist as alist of regexps, not literals

Cf http://lists.gnu.org/archive/html/emacs-devel/2005-08/msg00472.html

* lisp/files.el (interpreter-mode-alist): Convert to regexps.
(set-auto-mode): Adapt for this. 

* lisp/progmodes/cperl-mode.el (cperl-clobber-mode-lists):
Comment out unused variable.

* lisp/progmodes/cc-mode.el (interpreter-mode-alist):
* lisp/progmodes/python.el (interpreter-mode-alist):
* lisp/progmodes/ruby-mode.el (interpreter-mode-alist): Convert to regexps.

* lisp/progmodes/sh-script.el (sh-set-shell):
No longer use interpreter-mode-alist to get list of shells.

* etc/NEWS: Mention this.

Fixes: debbugs:15306

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 05d707acf43..bba4453cce8 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -225,7 +225,7 @@
 ;;;###autoload
 (add-to-list 'auto-mode-alist (cons (purecopy "\\.py\\'")  'python-mode))
 ;;;###autoload
-(add-to-list 'interpreter-mode-alist (cons (purecopy "python") 'python-mode))
+(add-to-list 'interpreter-mode-alist (cons (purecopy "\\`python[23.]*\\'") 'python-mode))
 
 (defgroup python nil
   "Python Language's flying circus support for Emacs."