(py-electric-colon): use a save-excursion instead of a progn in
indentation calculation test.
diff --git a/Misc/python-mode.el b/Misc/python-mode.el
index 7c87c35..42cbffd 100644
--- a/Misc/python-mode.el
+++ b/Misc/python-mode.el
@@ -431,7 +431,7 @@
 	  (indent (py-compute-indentation)))
       (if (and (not arg)
 	       (py-outdent-p)
-	       (= indent (progn
+	       (= indent (save-excursion
 			   (forward-line -1)
 			   (py-compute-indentation)))
 	       )