Spelling errors in hook_help() rendering element

         for this content type" and then click save.') . '</p>
         <p>' . t('Now you need to add permissions for which user roles which
-        are allowed to publsih content.') . '</p>
+        are allowed to publish content.') . '</p>

Actually, it should be Now you need to add permissions to those user roles that are allowed to publish content. (Emphasis is mine and it does need to be included in the shown message.