I'll take a look at the faq and see what I can do. Thanks for pointing it out.
You are right that the formatted sql doesn't support logicalFilePath. I created https://liquibase.jira.com/browse/CORE-1654 to remind me of the feature.
I looked at the extension for a couple minutes but I don't think there is the right hooks in liquibase to easily alter that logic yet. Resolving https://liquibase.jira.com/browse/CORE-1655 will let me write the extension.
Nathan