Fix whitespace and more comments

src/github.com/matrix-org/dendrite/roomserver/input/events.go

@@ -27,7 +27,7 @@ func processRoomEvent(db RoomEventDatabase, input api.InputRoomEvent) error {
 	if input.Kind == api.KindOutlier {
 		// For outliers we can stop after we've stored the event itself as it
 		// doesn't have any associated state to store and we don't need to
-		// notify anyone it.
+		// notify anyone about it.
 		return nil
 	}
 

src/github.com/matrix-org/dendrite/roomserver/storage/sql.go

@@ -292,8 +292,10 @@ CREATE TABLE IF NOT EXISTS events (
     -- Local numeric ID for the event.
     event_nid BIGINT PRIMARY KEY DEFAULT nextval('event_nid_seq'),
     -- Local numeric ID for the room the event is in.
+    -- This is never 0.
     room_nid BIGINT NOT NULL,
     -- Local numeric ID for the type of the event.
+    -- This is never 0.
     event_type_nid BIGINT NOT NULL,
     -- Local numeric ID for the state_key of the event
     -- This is 0 if the event is not a state event.