+ /** FIXME: the code below adds an extraneous computation of inset
+ * positions, and can therefore be bad for performance (think for
+ * example about a very large tabular inset. Redawing the row
+ * where it is means redrawing the whole screen).
+ *
+ * The bug that this fixes is the following: assume that there is
+ * a very large math inset. Upon entering the inset, when pressing
+ * `End', the row is not scrolled and the cursor is not visible. I
+ * am not sure why the extra row computation fixes the problem,
+ * actually.
+ *
+ * A proper fix should be found and this code should be removed.
+ */