normalize docs in callback plugins (#9455)

* normalize docs in callback plugins

Normalize doc blocks for plugins

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/callback/yaml.py

@@ -7,29 +7,27 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-DOCUMENTATION = '''
-    author: Unknown (!UNKNOWN)
-    name: yaml
-    type: stdout
-    short_description: YAML-ized Ansible screen output
-    description:
-        - Ansible output that can be quite a bit easier to read than the
-          default JSON formatting.
-    extends_documentation_fragment:
-      - default_callback
-    requirements:
-      - set as stdout in configuration
-    seealso:
-      - plugin: ansible.builtin.default
-        plugin_type: callback
-        description: >
-          There is a parameter O(ansible.builtin.default#callback:result_format) in P(ansible.builtin.default#callback)
-          that allows you to change the output format to YAML.
-    notes:
-      - >
-        With ansible-core 2.13 or newer, you can instead specify V(yaml) for the parameter O(ansible.builtin.default#callback:result_format)
-        in P(ansible.builtin.default#callback).
-'''
+DOCUMENTATION = r"""
+author: Unknown (!UNKNOWN)
+name: yaml
+type: stdout
+short_description: YAML-ized Ansible screen output
+description:
+  - Ansible output that can be quite a bit easier to read than the default JSON formatting.
+extends_documentation_fragment:
+  - default_callback
+requirements:
+  - set as stdout in configuration
+seealso:
+  - plugin: ansible.builtin.default
+    plugin_type: callback
+    description: >-
+      There is a parameter O(ansible.builtin.default#callback:result_format) in P(ansible.builtin.default#callback) that allows
+      you to change the output format to YAML.
+notes:
+  - With ansible-core 2.13 or newer, you can instead specify V(yaml) for the parameter O(ansible.builtin.default#callback:result_format)
+    in P(ansible.builtin.default#callback).
+"""
 
 import yaml
 import json