PEP 8 whitespace cleanup. (#20783)

* PEP 8 E271 whitespace cleanup.
* PEP 8 W293 whitespace cleanup.
* Fix whitespace issue from recent PR.

lib/ansible/modules/database/misc/redis.py

@@ -322,7 +322,7 @@ def main():
             e = get_exception()
             module.fail_json(msg="unable to connect to database: %s" % e)
 
-        
+
         try:
             old_value = r.config_get(name)[name]
         except Exception: