Clippy & fmt gang

src/main.rs

@@ -163,7 +163,7 @@ pub fn update_rendered_state(
             .get_mut(old_rendered_state)
             .expect("World is not setup correctly");
 
-        old_rendered_state.data = new_state.cells.clone();
+        old_rendered_state.data.clone_from(&new_state.cells);
     }
 }
 
@@ -216,4 +216,3 @@ fn main() -> std::io::Result<()> {
 
     Ok(())
 }
-