With NEW-WIN non-nil, display the virtual cursor buffer in another
window if the virtual cursor is not currently visible \(note, however,
-that this function never changes `window-point'\).
+that this function never changes `window-point').
With THIS-FRAME non-nil, don't search other frames for a new window
\(though if the vcursor is already off-frame then its current window is
-always considered, and the value of `pop-up-frames' is always respected\).
+always considered, and the value of `pop-up-frames' is always respected).
Returns nil if the virtual cursor is not visible anywhere suitable.
Set `vcursor-window' to the returned value as a side effect."