think in terms of lines and columns, not pixel coordinates. (Sometime
in the distant past, we will do away with graphical terminals
entirely, in favor of text terminals.) For similar reasons, the
-functions @code{posn-at-point} and @code{posn-at-x-y} have been removed, and
+functions @code{posn-at-point}, @code{posn-at-x-y}, and
+@code{window-line-height} have been removed, and
@code{pos-visible-in-window-p} no longer worries about partially
visible rows.