bug#29026: ediff control window initialized as fullscreen

[Shuguang Sun]

Hi,

The initialization of ediff control window is affected by the fullscreen in window-system-default-frame-alist.

If I put in my .emacs:

(cl-pushnew '(w32 (font . "Consolas-14")
                  (fullscreen . maximized))
            window-system-default-frame-alist)

So that for each new frame, it will try to make the frame fullscreen including the edif control window. And when the ediff control pop-up on the right-side of the screening from top to bottom (like fullscreen). When I type "?", it shows the help message windon. I type "?" again, it gets back to the control windown, and now the window is on the top-right of the screen as a small window.

I was suggested by Stefan Monnier:

    (with-eval-after-load 'ediff-wind
      (push '(fullscreen . nil) ediff-control-frame-parameters))

It solves the problem.

I think the default behavior of the initialized ediff control window should not be full-screened. I suggest to add '(fullscreen . nil)  to ediff-control-frame-parameters as default.

Best Regards,

Shuguang Sun