bug#57161: 28.1.91; two column windows merge leaves 2nd column window showing

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> I expect F2 2, F2 1 will get me back to the frame and window 
>> layout at the moment before F2 2.
>
> That's not what "F2 1" does.

I've never used this mode before, and I'm kinda flabbergasted that
something as esoteric as this is bound to <f2> by default.

Anyway, I don't really see how the current <f2> 1 action makes much
sense -- it merges the two buffers, but then keeps displaying the
rightmost window, but extremely narrowly?  I'm not sure why that's
useful.

(I'd expect, like Van Ly, this command to remove that window.)