[PR #9339/6e84c137 backport][stable-9] t*: normalize docs (#9355)

t*: normalize docs (#9339)

* t*: normalize docs

* Apply suggestions from code review

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

* break long line to regain sanity

---------

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 6e84c1375e)

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/modules/taiga_issue.py

@@ -9,8 +9,7 @@ from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
 
-DOCUMENTATION = '''
----
+DOCUMENTATION = r"""
 module: taiga_issue
 short_description: Creates/deletes an issue in a Taiga Project Management Platform
 description:
@@ -89,10 +88,11 @@ options:
 author: Alejandro Guirao (@lekum)
 requirements: [python-taiga]
 notes:
-- The authentication is achieved either by the environment variable TAIGA_TOKEN or by the pair of environment variables TAIGA_USERNAME and TAIGA_PASSWORD
-'''
+  - The authentication is achieved either by the environment variable E(TAIGA_TOKEN) or by the pair
+    of environment variables E(TAIGA_USERNAME) and E(TAIGA_PASSWORD).
+"""
 
-EXAMPLES = '''
+EXAMPLES = r"""
 - name: Create an issue in the my hosted Taiga environment and attach an error log
   community.general.taiga_issue:
     taiga_host: https://mytaigahost.example.com
@@ -117,9 +117,9 @@ EXAMPLES = '''
     subject: An error has been found
     issue_type: Bug
     state: absent
-'''
+"""
 
-RETURN = '''# '''
+RETURN = """# """
 import traceback
 
 from os import getenv