It's obvious that these people are not stupid and understand that interfaces need to be documented. They are instead confused. I've had micromanagers like SW be

It's obvious that these people are not stupid and understand that interfaces need to be documented. They are instead confused. I've had micromanagers like SW before, and have been confused many times at the state of something precisely because the micromanager took it upon themselves to "do it themselves" on the fly, just like SW did here. Admitting that it's clearly bad and saying you'll fix it by tomorrow would be a neverending pursuit, because the micromanager's meddling is constant and touches everything. No doubt somebody else will now be confused that this third parameter is suddenly documented when it was a task delegated to them, and somebody else is confused because they were told to deprecate the parameter.