ansible/T4/guided/file-manage/add_block.yml

- name: add a ablock to an existing file
  hosts: all
  remote_user: devops
  tasks:
    - name: add a block
      blockinfile:
        path: /home/devops/users.txt
        block: |
          This block of text consists of two lines
          They have been added by the blockinfile module
        state: present