feat: Add ability do distinguish the explicit block on the graph

[haidaraM]

Fix #14

[coveralls]

Coverage increased (+0.1%) to 94.694% when pulling c6fdd30 on feat/distinguishBlock into 9a0fdec on main.

[haidaraM]

---
- hosts: all
  tasks:
    - name: Install tree
      yum:
        name: tree
    - name: Install Apache
      when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "6")
      block:
        - name: Install some packages
          yum:
            name: "{{ item }}"
            state: installed
          with_items:
            - httpd
            - memcached
        - template:
            src: templates/src.j2
            dest: /etc/foo.conf
        - block:
            - get_url: url={{ remote_database_dump }} dest={{ local_database_dump }}
              when: "True"
            - command: pg_restore -d {{ dbname }} {{ local_database_dump }}
        - service:
            name: bar
            state: started
            enabled: True
  post_tasks:
    - name: Debug
      debug:
        msg: "Debug 1"