ruby-electric.el: use kill-region

* misc/ruby-electric.el (ruby-electric-curlies): use kill-region
  instead of interactive command delete-backward-char.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38108 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Dec  1 17:16:54 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* misc/ruby-electric.el (ruby-electric-curlies): use kill-region
+	  instead of interactive command delete-backward-char.
+
 Sat Dec  1 17:12:55 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* misc/inf-ruby.el (inferior-ruby-mode): fix the

misc/ruby-electric.el

@@ -174,7 +174,7 @@ strings. Note that you must have Font Lock enabled."
              (if (eq last-command-event ?{)
                  (save-excursion
                    (when (not (char-equal ?\# (preceding-char)))
-                       (delete-backward-char)
+                       (kill-region (point) (1- (point)))
                        (insert "#"))))
              (save-excursion
                (backward-char 1)