The deprecation notice seems to have been copied from
get_allocated_width(), but for get_allocation() height is also relevant.
* the assigned bounds, but not that they have exactly the bounds the
* container assigned.
*
- * Deprecated: 4.12: Use [method@Gtk.Widget.compute_bounds] or [method@Gtk.Widget.get_width] instead
+ * Deprecated: 4.12: Use [method@Gtk.Widget.compute_bounds],
+ * [method@Gtk.Widget.get_width] or [method@Gtk.Widget.get_height] instead.
*/
void
gtk_widget_get_allocation (GtkWidget *widget,