Fix linting issues (ansible-collections#781)

Author: Andersson007

plugins/modules/postgresql_ping.py

@@ -66,7 +66,7 @@
   register: result
   # If you need to fail when the server is not available,
   # uncomment the following line:
-  #failed_when: not result.is_available
+  # failed_when: not result.is_available
 
 # You can use the registered result with another task
 - name: This task should be executed only if the server is available

plugins/modules/postgresql_set.py

@@ -133,7 +133,6 @@
   community.postgresql.postgresql_set:
     name: TimeZone
     value: 'Europe/Paris'
-
 '''
 
 RETURN = r'''

plugins/modules/postgresql_user.py

@@ -242,8 +242,8 @@
     # password: SCRAM-SHA-256$4096:zFuajwIVdli9mK=NJkcv1Q++$JC4gWIrEHmF6sqRbEiZw5FFW45HUPrpVzNdoM72o730+;fqA4vLN3mCZGbhcbQyvNYY7anCrUTsem1eCh/4YA94=
     role_attr_flags: CREATEDB,NOSUPERUSER
   # When using sha256-hashed password:
-  #environment:
-  #  PGOPTIONS: "-c password_encryption=scram-sha-256"
+  # environment:
+  #   PGOPTIONS: "-c password_encryption=scram-sha-256"
 
 # This example uses the 'priv' argument which is deprecated.
 # You should use the 'postgresql_privs' module instead.