Postgresql docs fragments 2 (#55363)

* Postgres to use docsfragments
* Postgres to use docsfragments: redefined options in postgresql_user

lib/ansible/modules/database/postgresql/postgresql_db.py

@@ -17,7 +17,7 @@ module: postgresql_db
 short_description: Add or remove PostgreSQL databases from a remote host.
 description:
    - Add or remove PostgreSQL databases from a remote host.
-version_added: "0.6"
+version_added: '0.6'
 options:
   name:
     description:
@@ -58,7 +58,7 @@ options:
     - Switch to session_role after connecting. The specified session_role must be a role that the current login_user is a member of.
     - Permissions checking for SQL commands is carried out as though the session_role were the one that had logged in originally.
     type: str
-    version_added: "2.8"
+    version_added: '2.8'
   state:
     description:
     - The database state.
@@ -77,19 +77,19 @@ options:
     - File to back up or restore from.
     - Used when I(state) is C(dump) or C(restore).
     type: path
-    version_added: "2.4"
+    version_added: '2.4'
   target_opts:
     description:
     - Further arguments for pg_dump or pg_restore.
     - Used when I(state) is C(dump) or C(restore).
     type: str
-    version_added: "2.4"
+    version_added: '2.4'
   maintenance_db:
     description:
       - The value specifies the initial database (which is also called as maintenance DB) that Ansible connects to.
     type: str
     default: postgres
-    version_added: "2.5"
+    version_added: '2.5'
   conn_limit:
     description:
       - Specifies the database connection limit.