diff --git a/swarmlab/main.adoc b/swarmlab/main.adoc
index 80ca4b5..1c5669b 100644
--- a/swarmlab/main.adoc
+++ b/swarmlab/main.adoc
@@ -28,7 +28,7 @@ include::{sourcedir}/navigation/navigation_main.adoc[]
 include::{sourcedir}/tutor/for_tutors_main.adoc[]
 
 <<<
-
+ 
 = Platform Architecture
 
 include::{sourcedir}/Architecture.adoc[]