Ansible Templating issue

group_vars_all.ayml

test:
  multiline: |
    f4x6aaBtLPQk898Ymfkn
    TQsi69wDY40aluFbdp99
    jqdGOkx9CN2xgWOM8JeI
    M4lXnXyctLTDejDb2eZu
    XBPmvqXJStQFZIQwHzLF
    by0cxOYjrY3On6hj3oqk
    Xu0Ze6Sz8EbC7udHsyxE
    jNv0M7lWNJCfegOlDCJH
    UK56XrCbPj6HD4HfwT57
    dtwpXGkWMjhpe3UcMJJ8

hosts

[all]
localhost

site.yaml

- hosts: all
  tasks:
    - name: test templating
      delegate_to: localhost
      template:
        src: template.yaml.j2
        dest: "{{ playbook_dir }}/template.yaml"

template.yaml

multiline: 'f4x6aaBtLPQk898Ymfkn

    TQsi69wDY40aluFbdp99

    jqdGOkx9CN2xgWOM8JeI

    M4lXnXyctLTDejDb2eZu

    XBPmvqXJStQFZIQwHzLF

    by0cxOYjrY3On6hj3oqk

    Xu0Ze6Sz8EbC7udHsyxE

    jNv0M7lWNJCfegOlDCJH

    UK56XrCbPj6HD4HfwT57

    dtwpXGkWMjhpe3UcMJJ8

    '


{multiline: 'f4x6aaBtLPQk898Ymfkn

    TQsi69wDY40aluFbdp99

    jqdGOkx9CN2xgWOM8JeI

    M4lXnXyctLTDejDb2eZu

    XBPmvqXJStQFZIQwHzLF

    by0cxOYjrY3On6hj3oqk

    Xu0Ze6Sz8EbC7udHsyxE

    jNv0M7lWNJCfegOlDCJH

    UK56XrCbPj6HD4HfwT57

    dtwpXGkWMjhpe3UcMJJ8

    '}


f4x6aaBtLPQk898Ymfkn
TQsi69wDY40aluFbdp99
jqdGOkx9CN2xgWOM8JeI
M4lXnXyctLTDejDb2eZu
XBPmvqXJStQFZIQwHzLF
by0cxOYjrY3On6hj3oqk
Xu0Ze6Sz8EbC7udHsyxE
jNv0M7lWNJCfegOlDCJH
UK56XrCbPj6HD4HfwT57
dtwpXGkWMjhpe3UcMJJ8

template.yaml.j2

{{ test | to_nice_yaml }}

{{ test | to_yaml }}

{{ test.multiline }}

version

$ ansible --version                  
ansible 2.8.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/j/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.7.3 (default, Mar 26 2019, 21:43:19) [GCC 8.2.1 20181127]