> * Removed the tab-complete bit, it was too fragile and unhelpful
I can’t speak for the specific patch, but tab completion of proc args for \df, \ef and friends has long been a desired feature of mine, particularly when you are dealing with functions with huge numbers of arguments and the same name which I have (sadly) come across many times in the wild.
Removing this because it was brittle is fine, but would be good to see if we could figure out a way to have this kind of feature in psql IMHO.
Best,
David