Add example showing how to add host to multiple groups (#31152)

* Add example of how to add host to multiple groups

* use 'name' task keyword for comments

lib/ansible/modules/inventory/add_host.py

@@ -43,24 +43,31 @@ author:
 '''
 
 EXAMPLES = '''
-# add host to group 'just_created' with variable foo=42
+- name: add host to group 'just_created' with variable foo=42
-- add_host:
+  add_host:
     name: "{{ ip_from_ec2 }}"
     groups: just_created
     foo: 42
 
-# add a host with a non-standard port local to your machines
+- name: add host to multiple groups
-- add_host:
+  add_host:
+    hostname: "{{ new_ip }}"
+    groups:
+      - group1
+      - group2
+
+- name: add a host with a non-standard port local to your machines
+  add_host:
     name: "{{ new_ip }}:{{ new_port }}"
 
-# add a host alias that we reach through a tunnel (Ansible <= 1.9)
+- name: add a host alias that we reach through a tunnel (Ansible <= 1.9)
-- add_host:
+  add_host:
     hostname: "{{ new_ip }}"
     ansible_ssh_host: "{{ inventory_hostname }}"
     ansible_ssh_port: "{{ new_port }}"
 
-# add a host alias that we reach through a tunnel (Ansible >= 2.0)
+- name: add a host alias that we reach through a tunnel (Ansible >= 2.0)
-- add_host:
+  add_host:
     hostname: "{{ new_ip }}"
     ansible_host: "{{ inventory_hostname }}"
     ansible_port: "{{ new_port }}"