From 2edfc40a72439d0e1b8ccd5ad8d1523e0de601c0 Mon Sep 17 00:00:00 2001
From: Dmitry Gutov <dgutov@yandex.ru>
Date: Mon, 16 Nov 2015 01:14:54 +0200
Subject: [PATCH] Fix ruby-mode auto-mode-alist entry

* lisp/progmodes/ruby-mode.el (auto-mode-alist): Add grouping
around the extensions (bug#21257).
---
 lisp/progmodes/ruby-mode.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/progmodes/ruby-mode.el b/lisp/progmodes/ruby-mode.el
index 754785168f2..ab83b977320 100644
--- a/lisp/progmodes/ruby-mode.el
+++ b/lisp/progmodes/ruby-mode.el
@@ -2258,9 +2258,10 @@ See `font-lock-syntax-table'.")
 
 ;;;###autoload
 (add-to-list 'auto-mode-alist
-             (cons (purecopy (concat "\\(?:\\."
+             (cons (purecopy (concat "\\(?:\\.\\(?:"
                                      "rb\\|ru\\|rake\\|thor"
                                      "\\|jbuilder\\|rabl\\|gemspec\\|podspec"
+                                     "\\)"
                                      "\\|/"
                                      "\\(?:Gem\\|Rake\\|Cap\\|Thor"
                                      "\\|Puppet\\|Berks"
-- 
2.39.5