hopefully the last edit of that atom layout template

layouts/index.atom.xml

@@ -29,9 +29,10 @@
     <published>{{ .Date.Format "2006-01-02T15:04:05-07:00" | safeHTML }}</published>
     <updated>{{ .Lastmod.Format "2006-01-02T15:04:05-07:00" | safeHTML }}</updated>
     {{ if .Site.Params.rssFullContent }}
-    <summary type="html">{{ .Content | htmlEscape }}</summary>
+    <summary type="html">{{ .Summary | html }}</summary>
+    <content type="html">{{ .Content | html }}</content>
     {{ else }}
-    <summary type="html">{{ .Summary | htmlUnescape | markdownify | htmlEscape }}</summary>
+    <summary type="html">{{ .Summary | html }}</summary>
     {{ end }}
   </entry>
   {{ end }}{{ end }}