correct spelling to US english (#6077)

state/execution_test.go

@@ -405,8 +405,8 @@ func TestEndBlockValidatorUpdates(t *testing.T) {
 			assert.Equal(t, pubkey, event.ValidatorUpdates[0].PubKey)
 			assert.EqualValues(t, 10, event.ValidatorUpdates[0].VotingPower)
 		}
-	case <-updatesSub.Cancelled():
-		t.Fatalf("updatesSub was cancelled (reason: %v)", updatesSub.Err())
+	case <-updatesSub.Canceled():
+		t.Fatalf("updatesSub was canceled (reason: %v)", updatesSub.Err())
 	case <-time.After(1 * time.Second):
 		t.Fatal("Did not receive EventValidatorSetUpdates within 1 sec.")
 	}

state/state_test.go

@@ -40,7 +40,7 @@ func setupTestCase(t *testing.T) (func(t *testing.T), dbm.DB, sm.State) {
 	return tearDown, stateDB, state
 }
 
-// TestStateCopy tests the correct copying behaviour of State.
+// TestStateCopy tests the correct copying behavior of State.
 func TestStateCopy(t *testing.T) {
 	tearDown, _, state := setupTestCase(t)
 	defer tearDown(t)

state/txindex/indexer_service.go

@@ -32,7 +32,7 @@ func NewIndexerService(idr TxIndexer, eventBus *types.EventBus) *IndexerService
 // and indexing them by events.
 func (is *IndexerService) OnStart() error {
 	// Use SubscribeUnbuffered here to ensure both subscriptions does not get
-	// cancelled due to not pulling messages fast enough. Cause this might
+	// canceled due to not pulling messages fast enough. Cause this might
 	// sometimes happen when there are no other subscribers.
 
 	blockHeadersSub, err := is.eventBus.SubscribeUnbuffered(