Fixed wrong author name in feed.xml

feed.xml

@@ -16,7 +16,11 @@ sitemap: false
   {% if site.owner.email %}<email>{{ site.owner.email }}</email>{% endif %}
 </author>
 {% for post in site.posts limit:20 %}
-
+{% if post.author %}
+  {% assign author = site.data.authors[post.author] %}
+{% else %}
+  {% assign author = site.owner %}
+{% endif %}
 <entry>
   <title type="html"><![CDATA[{{ post.title | cdata_escape }}]]></title>
   <link rel="alternate" type="text/html" href="{{ site.url }}{{ post.url }}" />
@@ -26,12 +30,12 @@ sitemap: false
   {% else %}<published>{{ post.date | date_to_xmlschema }}</published>
   <updated>{{ post.date | date_to_xmlschema }}</updated>{% endif %}
   <author>
-    <name>{{ site.owner.name }}</name>
+    <name>{{ author.name }}</name>
     <uri>{{ site.url }}</uri>
-    <email>{{ site.owner.email }}</email>
+    <email>{{ author.email }}</email>
   </author>
   <content type="html">{{ post.content | xml_escape }}
-  &lt;p&gt;&lt;a href=&quot;{{ site.url }}{{ post.url }}&quot;&gt;{{ post.title }}&lt;/a&gt; was originally published by {{ site.owner.name }} at &lt;a href=&quot;{{ site.url }}&quot;&gt;{{ site.title }}&lt;/a&gt; on {{ post.date | date: "%B %d, %Y" }}.&lt;/p&gt;</content>
+  &lt;p&gt;&lt;a href=&quot;{{ site.url }}{{ post.url }}&quot;&gt;{{ post.title }}&lt;/a&gt; was originally published by {{ author.name }} at &lt;a href=&quot;{{ site.url }}&quot;&gt;{{ site.title }}&lt;/a&gt; on {{ post.date | date: "%B %d, %Y" }}.&lt;/p&gt;</content>
 </entry>
 {% endfor %}
 </feed>