Do not put date as it will always change the file

ansible.cfg

@@ -10,7 +10,7 @@ retry_files_enabled = False
 inventory = ./hosts
 
 # Custom header in templates
-ansible_managed = Ansible managed, modified on %Y-%m-%d %H:%M:%S by {uid}
+ansible_managed = Ansible managed, see https://gitlab.crans.org/nounous/ansible
 
 # Do not use cows (with cowsay)
 nocows = 1