bug#62164: 29.0.60; ediff behaves poorly by default on tiling window managers

[Robert Pluim <rpluim@gmail.com>]

>>>>> On Wed, 28 Jun 2023 08:55:13 -0400, Spencer Baugh <sbaugh@janestreet.com> said:

    Spencer> * lisp/vc/ediff-wind.el (ediff-floating-control-frame): Add
    Spencer> defcustom.
    Spencer> (ediff-frame-make-utility, ediff-setup-control-frame): Allow setting
    Spencer> the control frame up as a utility window under X. (bug#62164)

Two spaces after full stop. And I think the convention is to
capitalize 'Bug', but we donʼt follow that very consistently.

I think the new user option warrants an entry in etc/NEWS

    Spencer> ---
    Spencer>  lisp/vc/ediff-wind.el | 22 ++++++++++++++++++++++
    Spencer>  1 file changed, 22 insertions(+)

    Spencer> diff --git a/lisp/vc/ediff-wind.el b/lisp/vc/ediff-wind.el
    Spencer> index eb903f093f9..74e0e1f9b9f 100644
    Spencer> --- a/lisp/vc/ediff-wind.el
    Spencer> +++ b/lisp/vc/ediff-wind.el
    Spencer> @@ -69,6 +69,16 @@ ediff-window-setup-function
    Spencer>  		 (function :tag "Other function"))
    Spencer>    :version "24.3")
 
    Spencer> +(defcustom ediff-floating-control-frame nil
    Spencer> +  "If not-nil, try making the control frame be floating rather than tiled.
    Spencer> +

Style: the description of the option should state the action that
follows from a non-nil value:

"Whether to request a floating control frame rather than a tiled one."

Robert
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