message: Use `Theme::Dark` in `pure_game_of_life` example
diff: @@ -152,6 +152,10 @@ impl Application for GameOfLife {
  .height(Length::Fill)
  .into()
  }
  +
  + fn theme(&self) -> Theme {
  + Theme::Dark
  + }
  }
  fn view_controls<'a>(
  