diff --git a/rmf_demos_gz/launch/simulation.launch.xml b/rmf_demos_gz/launch/simulation.launch.xml
index 3ac4409c..ce19d37d 100644
--- a/rmf_demos_gz/launch/simulation.launch.xml
+++ b/rmf_demos_gz/launch/simulation.launch.xml
@@ -9,7 +9,7 @@
-
+
diff --git a/rmf_demos_ign/launch/simulation.launch.xml b/rmf_demos_ign/launch/simulation.launch.xml
index b0899491..248f91ab 100644
--- a/rmf_demos_ign/launch/simulation.launch.xml
+++ b/rmf_demos_ign/launch/simulation.launch.xml
@@ -8,7 +8,7 @@
-
+