bug#31858: 27.0; doc of `window-toggle-side-windows'

[Eli Zaretskii]

> Date: Sat, 16 Jun 2018 05:35:10 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> 
> AFAICT, neither the doc string nor the manual says what toggling the
> side windows DOES or MEANS.  Just what behavior or appearance is
> toggled?  What happens when a side window is - or all side windows are -
> toggled?

That's strange.  I found answers to those questions in the doc string:

  If FRAME has at least one side window, save FRAME’s state in the
  FRAME’s ‘window-state’ frame parameter and delete all side
  windows on FRAME afterwards.  Otherwise, if FRAME has a
  ‘window-state’ parameter, use that to restore any side windows on
  FRAME leaving FRAME’s main window alone.  Signal an error if
  FRAME has no side window and no saved state is found.

So I don't understand what is missing there.  Could you be more
specific regarding the problems you see in this text?