instance method Curses::Window#scrollok
scrollok(bf) -> nil
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[TODO]
Controls what happens when the cursor of a window is moved off the edge of the window or scrolling region, either as a result of a newline action on the bottom line, or typing the last character of the last line.
If disabled, (+bool+ is false), the cursor is left on the bottom line.
If enabled, (+bool+ is true), the window is scrolled up one line (Note that to get the physical scrolling effect on the terminal, it is also necessary to call Curses::Window.idlok)
class Curses::Window