fixed hidden warnings from extra tests - batch 2 (#10027)

* fixed hidden warnings from extra tests - batch 2

* remove multiple yaml doc markers from EXAMPLE blocks

* Apply suggestions from code review

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

* Apply suggestions from code review

* Apply suggestions from code review

* dig: adjust markup for return suboptions

* Update plugins/lookup/dig.py

---------

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

plugins/lookup/shelvefile.py

@@ -6,34 +6,35 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-DOCUMENTATION = '''
-    name: shelvefile
-    author: Alejandro Guirao (!UNKNOWN) <lekumberri@gmail.com>
-    short_description: read keys from Python shelve file
-    description:
-      - Read keys from Python shelve file.
-    options:
-      _terms:
-        description: Sets of key value pairs of parameters.
-        type: list
-        elements: str
-      key:
-        description: Key to query.
-        type: str
-        required: true
-      file:
-        description: Path to shelve file.
-        type: path
-        required: true
-'''
+DOCUMENTATION = r"""
+name: shelvefile
+author: Alejandro Guirao (!UNKNOWN) <lekumberri@gmail.com>
+short_description: read keys from Python shelve file
+description:
+  - Read keys from Python shelve file.
+options:
+  _terms:
+    description: Sets of key value pairs of parameters.
+    type: list
+    elements: str
+  key:
+    description: Key to query.
+    type: str
+    required: true
+  file:
+    description: Path to shelve file.
+    type: path
+    required: true
+"""
 
-EXAMPLES = """
+EXAMPLES = r"""
+---
 - name: Retrieve a string value corresponding to a key inside a Python shelve file
   ansible.builtin.debug:
     msg: "{{ lookup('community.general.shelvefile', 'file=path_to_some_shelve_file.db key=key_to_retrieve') }}"
 """
 
-RETURN = """
+RETURN = r"""
 _list:
   description: Value(s) of key(s) in shelve file(s).
   type: list