From 2c4acbc67f934f52896f08796d7f0e1262b8d4d2 Mon Sep 17 00:00:00 2001
From: Adam Prescott <adam@aprescott.com>
Date: Thu, 21 Mar 2013 18:47:09 +0000
Subject: [PATCH] Escape post.title in atom.xml.

If post.title were to contain one of '&', '<', or '>', the XML would
become invalid. xml_escape is a Jekyll extension of Liquid to safely
escape values.

Using straight Liquid, this could also be done with:

<title type="html">
    {{ post.title | escape
                  | replace:'&','&amp;'
                  | replace:'<','&lt;'
                  | replace:'>','&gt;' }}
</title>

(Note, type=html and then the additional XML escaping.)
---
 atom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/atom.xml b/atom.xml
index f529849..aac0930 100644
--- a/atom.xml
+++ b/atom.xml
@@ -16,7 +16,7 @@ layout: nil
  
  {% for post in site.posts %}
  <entry>
-   <title>{{ post.title }}</title>
+   <title>{{ post.title | xml_escape }}</title>
    <link href="http://blog.rubygems.org{{ post.url }}"/>
    <updated>{{ post.date | date_to_xmlschema }}</updated>
    <id>http://blog.rubygems.org{{ post.id }}</id>