Feed xml from jekyll site

feed.xml

---
permalink: /feed.xml
---

<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
  xmlns:content="http://purl.org/rss/1.0/modules/content/"
  xmlns:wfw="http://wellformedweb.org/CommentAPI/"
  xmlns:dc="http://purl.org/dc/elements/1.1/"
  xmlns:atom="http://www.w3.org/2005/Atom"
  xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
  xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
  >
  <channel>
    <title xml:lang="en">Jekyll • Simple, blog-aware, static sites</title>
    <atom:link type="application/atom+xml" href="http://jekyllrb.com/feed.xml" rel="self"/>
    <link>http://jekyllrb.com/</link>
    <pubDate>{{ site.time | date_to_rfc822 }}</pubDate>
    <lastBuildDate>{{ site.time | date_to_rfc822 }}</lastBuildDate>
    <language>en-US</language>
    <generator>Jekyll v{{ jekyll.version }}</generator>
    <description>Transform your plain text into static websites and blogs.</description>
    <image>
      <description>Transform your plain text into static websites and blogs.</description>
      <url>http://jekyllrb.com/img/logo-rss.png</url>
      <title>Jekyll • Simple, blog-aware, static sites</title>
      <link>http://jekyllrb.com/</link>
      <width>144</width>
      <height>73</height>
    </image>
    {% for post in site.posts %}
    <item>
      <title>{{ post.title | xml_escape}}</title>
      <link>http://jekyllrb.com{{ post.url }}</link>
      <pubDate>{{ post.date | date_to_rfc822 }}</pubDate>
      <dc:creator>{{ post.author }}</dc:creator>
      {% for tag in post.tags %}
      <category>{{ tag | xml_escape }}</category>
      {% endfor %}
      {% for cat in post.categories %}
      <category>{{ cat | xml_escape }}</category>
      {% endfor %}
      <guid isPermaLink="true">http://jekyllrb.com{{ post.url }}</guid>
      <description>{{ post.content | xml_escape }}</description>
    </item>
    {% endfor %}
  </channel>
</rss>