--- a/mod_pubsub_summary/mod_pubsub_summary.lua	Wed Feb 10 16:05:14 2021 +0100
+++ b/mod_pubsub_summary/mod_pubsub_summary.lua	Wed Feb 10 16:06:30 2021 +0100
@@ -31,7 +31,7 @@
 			});
 	end
 	local summary;
-	if title and content then
+	if title and content and content:sub(1, #title) ~= title then
 		summary = title .. "\n\n" .. content;
 	elseif title or content then
 		summary = content or title;