improper behavior of (scroll-down 0)

[Shiyao Ma]

Hi,

To reproduce the problem,
for example,

1. go to the info node (elisp)Top > Positions > Excursions
2. go to the beginning of the window: (goto-char (point-min))
3. scroll the window, (scroll-down 0)

Oops, the window scrolls down by 1.

What's happening here and how to rectify this ?


Regards.

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