tuple to struct event variants (#10257)

* AFNPEV recovery

* AFNPEV session

* cargo +nightly fmt && cargo fmt

* removed redundant comments

* update

* update & cargo +nightly fmt

* update & cargo +nightly fmt

* update recovery/src/lib.rs

* update session/src/lib.rs

substrate/frame/session/src/lib.rs

@@ -532,9 +532,9 @@ pub mod pallet {
 	#[pallet::event]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
 	pub enum Event {
-		/// New session has happened. Note that the argument is the \[session_index\], not the
+		/// New session has happened. Note that the argument is the session index, not the
 		/// block number as the type might suggest.
-		NewSession(SessionIndex),
+		NewSession { session_index: SessionIndex },
 	}
 
 	/// Old name generated by `decl_event`.
@@ -703,7 +703,7 @@ impl<T: Config> Pallet<T> {
 		<QueuedChanged<T>>::put(next_changed);
 
 		// Record that this happened.
-		Self::deposit_event(Event::NewSession(session_index));
+		Self::deposit_event(Event::NewSession { session_index });
 
 		// Tell everyone about the new session keys.
 		T::SessionHandler::on_new_session::<T::Keys>(changed, &session_keys, &queued_amalgamated);