include phantom data in SystemId debug

crates/bevy_ecs/src/system/system_registry.rs

@@ -43,28 +43,34 @@ pub struct SystemId<I = (), O = ()>(Entity, std::marker::PhantomData<fn(I) -> O>
 
 // A manual impl is used because the trait bounds should ignore the `I` and `O` phantom parameters.
 impl<I, O> Copy for SystemId<I, O> {}
+
 // A manual impl is used because the trait bounds should ignore the `I` and `O` phantom parameters.
 impl<I, O> Clone for SystemId<I, O> {
     fn clone(&self) -> Self {
         *self
     }
 }
+
 // A manual impl is used because the trait bounds should ignore the `I` and `O` phantom parameters.
 impl<I, O> PartialEq for SystemId<I, O> {
     fn eq(&self, other: &Self) -> bool {
         self.0 == other.0 && self.1 == other.1
     }
 }
+
 // A manual impl is used because the trait bounds should ignore the `I` and `O` phantom parameters.
 impl<I, O> std::hash::Hash for SystemId<I, O> {
     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
         self.0.hash(state);
     }
 }
+
 impl<I, O> std::fmt::Debug for SystemId<I, O> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        // The PhantomData field is omitted for simplicity.
-        f.debug_tuple("SystemId").field(&self.0).finish()
+        f.debug_tuple("SystemId")
+            .field(&self.0)
+            .field(&self.1)
+            .finish()
     }
 }