From 196e26b580c5f001a6671094e046b1c6bbd30f78 Mon Sep 17 00:00:00 2001
From: "Aleksey V. Zapparov" <ixti@member.fsf.org>
Date: Tue, 19 Mar 2013 23:14:39 +0100
Subject: [PATCH] Flatten tags and categories lists. Fixes #741.

---
 lib/jekyll/post.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/jekyll/post.rb b/lib/jekyll/post.rb
index 38ae3986..62c36d42 100644
--- a/lib/jekyll/post.rb
+++ b/lib/jekyll/post.rb
@@ -62,6 +62,9 @@ module Jekyll
       if self.categories.empty?
         self.categories = self.data.pluralized_array('category', 'categories').map {|c| c.downcase}
       end
+
+      self.tags.flatten!
+      self.categories.flatten!
     end
 
     # Get the full path to the directory containing the post files