fix: improve readability of bind9 configuration and update variable registration

defaults/main.yml

@@ -27,5 +27,11 @@ bind9_default_config:
     options:
       directory: "{{ bind9_working_directory }}"
 
-bind9_config: "{{ [bind9_default_config, bind9_group_config, bind9_site_config, bind9_host_config] | community.general.lists_mergeby('name', recursive=true, list_merge='append_rp')
-  }}"
+bind9_config: >-
+  {{
+    [bind9_default_config,
+     bind9_group_config,
+     bind9_site_config,
+     bind9_host_config] |
+    community.general.lists_mergeby('name', recursive=true, list_merge='append_rp')
+  }}

tasks/main.yml

@@ -50,7 +50,7 @@
       loop: "{{ bind9_config }}"
       loop_control:
         label: "{{ item.name }}"
-      register: _template_result
+      register: bind9_template_result
 
     - name: Validate configuration using named-checkconf
       ansible.builtin.command: