---
- hosts: webservers
  vars:
    varset: varset
  tasks:
    - block:
        - include: nestedincludes.yml tags=nested
        - block:
            - include: "{{ varnotset }}.yml"
            - block:
                - include: "{{ varset }}.yml"
                - block:
                    - include: "directory with spaces/main.yml"