Re: minor doc fix - garbage in example of result of unnest

More generally I think the final unnest listing is probably the best presentation for a set-returning function, and the one under discussion should be consistent with it.  The function reference documentation doesn't seem like a place to introduce strictly psql output variations like /pset footer on|off.  A set-returning function should be displayed in the example output as a structured table like the last unnest example.  I don't think it's necessary for "single column" sets to be an exception.  Since the examples convert null to (none) there isn't even whitespace concerns in the output where you want to display a bottom boundary for clarity.

Related, It seems arbitrary that the case-related full block examples do not have row counts but the aggregate full block examples do.

I don't see where having the row counts in the output adds clarity and it just more text for the reader to mentally filter out.

David J.