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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Interactive guide for new users
Date: Sun, 13 Sep 2020 19:51:10 +0300
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Cc: ghe@sdf.org, spacibba@aol.com, emacs-devel@gnu.org, casouri@gmail.com,
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To: John Yates <john@yates-sheets.org>
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 (message from John Yates on Sun, 13 Sep 2020 12:38:14 -0400)
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> From: John Yates <john@yates-sheets.org>
> Date: Sun, 13 Sep 2020 12:38:14 -0400
> Cc: Dmitry Gutov <dgutov@yandex.ru>, ghe@sdf.org, Ergus <spacibba@aol.com>, 
> 	Yuan Fu <casouri@gmail.com>, Emacs developers <emacs-devel@gnu.org>
> 
> IIUC, the misfeature to which Eli refers is a desire to preserve
> visibility of a window's top line in the face of window resizing.

No, the reason is that Emacs always keeps point visible.  So when the
mini-window needs to be expanded in a way that will hide the point's
line, the selected window will scroll to keep point visible.