message: Add some missing `spacing` to `scrollable` example
diff: @@ -134,6 +134,7 @@ impl Application for ScrollableDemo {
  text("Scroller width:"),
  scroller_width_slider,
  ]
  + .spacing(10)
  .width(Length::Fill);
  let scroll_orientation_controls = column(vec![
  @@ -160,6 +161,7 @@ impl Application for ScrollableDemo {
  )
  .into(),
  ])
  + .spacing(10)
  .width(Length::Fill);
  let scroll_controls =
  