message: removed the mut, so the checks are happy
diff: @@ -144,7 +144,7 @@ impl event::EventHandler for MainState {
  pub fn main() -> GameResult {
  let cb = ggez::ContextBuilder::new("input_test", "ggez");
  - let (mut ctx, event_loop) = cb.build()?;
  + let (ctx, event_loop) = cb.build()?;
  // remove the comment to see how physical mouse coordinates can differ
  // from logical game coordinates when the screen coordinate system changes
  