fix: cache calculation

src/sim/engine.rs

@@ -56,7 +56,11 @@ impl EventQueue {
     pub fn schedule(&mut self, time: f64, event: Event) {
         let t = time.max(self.now);
         self.seq += 1;
-        self.heap.push(Slot { time: t, seq: self.seq, event });
+        self.heap.push(Slot {
+            time: t,
+            seq: self.seq,
+            event,
+        });
     }
 
     pub fn pop(&mut self) -> Option<(f64, Event)> {
@@ -84,7 +88,12 @@ mod tests {
     #[test]
     fn pops_in_time_order() {
         let mut q = EventQueue::new();
-        q.schedule(2.0, Event::BatchTick { instance: 0 as InstanceId });
+        q.schedule(
+            2.0,
+            Event::BatchTick {
+                instance: 0 as InstanceId,
+            },
+        );
         q.schedule(1.0, Event::BatchTick { instance: 1 });
         q.schedule(1.5, Event::BatchTick { instance: 2 });
         let (t1, _) = q.pop().unwrap();