default_callback: Move 'check_mode_markers' in doc_fragments (#70228) (#70989)

Callback plugin dense, yaml, and debug implement 'check_mode_markers'
so moving documentation to default callback doc_fragments.

Fixes: https://github.com/ansible-collections/community.general/issues/565

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
(cherry picked from commit 4885ebad27)

Co-authored-by: Abhijeet Kasurde <akasurde@redhat.com>

changelogs/fragments/565_default_callback.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- default_callback - moving 'check_mode_markers' documentation in default_callback doc_fragment (https://github.com/ansible-collections/community.general/issues/565).

lib/ansible/plugins/callback/default.py

@@ -16,26 +16,8 @@ DOCUMENTATION = '''
       - default_callback
     requirements:
       - set as stdout in configuration
-    options:
-      check_mode_markers:
-        name: Show markers when running in check mode
-        description:
-        - "Toggle to control displaying markers when running in check mode. The markers are C(DRY RUN)
-        at the beggining and ending of playbook execution (when calling C(ansible-playbook --check))
-        and C(CHECK MODE) as a suffix at every play and task that is run in check mode."
-        type: bool
-        default: no
-        version_added: 2.9
-        env:
-          - name: ANSIBLE_CHECK_MODE_MARKERS
-        ini:
-          - key: check_mode_markers
-            section: defaults
 '''
 
-# NOTE: check_mode_markers functionality is also implemented in the following derived plugins:
-#       debug.py, yaml.py, dense.py. Maybe their documentation needs updating, too.
-
 
 from ansible import constants as C
 from ansible import context

lib/ansible/plugins/doc_fragments/default_callback.py

@@ -68,4 +68,18 @@ class ModuleDocFragment(object):
           - key: show_per_host_start
             section: defaults
         version_added: '2.9'
+      check_mode_markers:
+        name: Show markers when running in check mode
+        description:
+        - Toggle to control displaying markers when running in check mode.
+        - "The markers are C(DRY RUN) at the beggining and ending of playbook execution (when calling C(ansible-playbook --check))
+        and C(CHECK MODE) as a suffix at every play and task that is run in check mode."
+        type: bool
+        default: no
+        version_added: '2.9'
+        env:
+          - name: ANSIBLE_CHECK_MODE_MARKERS
+        ini:
+          - key: check_mode_markers
+            section: defaults
 '''