From a88a63da2ddaa814a4d735e78fdcbaa12a084d95 Mon Sep 17 00:00:00 2001
From: Parker Moore <parkrmoore@gmail.com>
Date: Sun, 22 Sep 2013 18:26:34 -0400
Subject: [PATCH] Don't use destructive Array#concat for Liquid Attribute
 arrays

---
 lib/jekyll/post.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/jekyll/post.rb b/lib/jekyll/post.rb
index 291921ff..da64af93 100644
--- a/lib/jekyll/post.rb
+++ b/lib/jekyll/post.rb
@@ -19,10 +19,10 @@ module Jekyll
     ]
 
     # Attributes for Liquid templates
-    ATTRIBUTES_FOR_LIQUID = EXCERPT_ATTRIBUTES_FOR_LIQUID.concat(%w[
+    ATTRIBUTES_FOR_LIQUID = EXCERPT_ATTRIBUTES_FOR_LIQUID + %w[
       content
       excerpt
-    ])
+    ]
 
     # Post name validator. Post filenames must be like:
     # 2008-11-05-my-awesome-post.textile