Re: [patch] \g with multiple result sets and \watch with copy queries

I wrote:
> Ugh.  I think we'd better fix that before 15.0, else somebody may
> think this is the new intended behavior and raise compatibility
> concerns when we fix it.  I will see if I can squeeze it in before
> this afternoon's 15rc2 wrap.

Pushed after making some corrections.

Given the time pressure, I did not worry about installing regression
test coverage for this stuff, but I wonder if we shouldn't add some.

            regards, tom lane