### my state file:
{%- set testString1 ='test string to append' -%}




salt-managed-file-append:
  file.append:
    - name: /root/test_tags
    - template: jinja
    - text:
      - {{ testString1 }}
  {%- if 'dmz' in pillar['tags']   -%}
      - 'dmzX'
  {%- endif -%}