bug#16115: 24.3.50; doc string of `display-buffer-in-side-window' - there is no SIDE arg

[Juri Linkov]

> If the frame is wide enough, `display-buffer-below-selected' will
> display it on the right of the selected window, otherwise below.  This
> can be tuned via `split-height-/width-threshold'.

Shouldn't `display-buffer-below-selected' display the buffer below,
and not on the right?  I.e. like you recently added the let-binding
`(split-width-threshold)' to `display-buffer-at-bottom',
it would also make sense to do the same by moving the let-binding
`(split-height-threshold 0)' to `display-buffer-below-selected'.