use vars instead of msg

ping.yml

@@ -20,12 +20,6 @@
     - name: Clear host errors
       ansible.builtin.meta: clear_host_errors
 
-    # - name: Ping check results
-    #   ansible.builtin.debug:
-    #     msg: "{{ lookup('template', 'ping_results.j2') | from_yaml }}"
-    #   run_once: true # noqa: run-once[task]
-    #   delegate_to: localhost
-
     - name: Set facts
       ansible.builtin.set_fact:
         successful_hosts: "{{ successful_hosts | default([]) + ansible_play_batch }}"
@@ -35,13 +29,13 @@
 
     - name: Successful Hosts
       ansible.builtin.debug:
-        msg: "{{ successful_hosts }}"
+        var: successful_hosts
       run_once: true # noqa: run-once[task]
       delegate_to: localhost
 
     - name: Failed Hosts
       ansible.builtin.debug:
-        msg: "{{ failed_hosts }}"
+        var: failed_hosts
       run_once: true # noqa: run-once[task]
       delegate_to: localhost