Broken list output

output

ubuntu@dea9046af7b9:~$ ansible-playbook test.yml
 [WARNING]: Host file not found: /etc/ansible/hosts

 [WARNING]: provided hosts list is empty, only localhost is available


PLAY [localhost] ******************************************************************************************************************************************************************

TASK [debug] **********************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": "   [u'test', u'list', u'things']"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": [
        "test",
        "list",
        "things"
    ]
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": [
        "test",
        "list",
        "things"
    ]
}

PLAY RECAP ************************************************************************************************************************************************************************
localhost                  : ok=3    changed=0    unreachable=0    failed=0

test.yml

- hosts: localhost
  gather_facts: no
  vars:
    others_lxc_container_config_list: ['test', 'list', 'things']
    cinder_lxc_container_config_list: ['another', 'test', 'list', 'of', 'things']
    lxc_container_config_list: >-
      {% set config_list =  [] %}
      {% set _ = config_list.extend(others_lxc_container_config_list) %}
      {% if 'cinder_api' in group_names %}
      {% set _ = config_list.extend(cinder_lxc_container_config_list) %}
      {% endif %}
      {{ config_list }}
    lxc_container_config_list_fixed: |-
      {% set config_list =  [] %}
      {% set _ = config_list.extend(others_lxc_container_config_list) %}
      {% if 'cinder_api' in group_names %}
      {% set _ = config_list.extend(cinder_lxc_container_config_list) %}
      {% endif %}
      {{ config_list }}
    lxc_container_config_list_fixed2: >-
      {% set config_list =  [] -%}
      {% set _ = config_list.extend(others_lxc_container_config_list) -%}
      {% if 'cinder_api' in group_names -%}
      {% set _ = config_list.extend(cinder_lxc_container_config_list) -%}
      {% endif -%}
      {{ config_list }}
  tasks:
     - debug:
         msg: "{{ lxc_container_config_list }}"
     - debug:
         msg: "{{ lxc_container_config_list_fixed }}"
     - debug:
         msg: "{{ lxc_container_config_list_fixed2 }}"