code: func User(
  	scanner reddit.Scanner,
  	kill <-chan bool,
  	errs chan<- error,
  	user string,
  ) (
  	<-chan *reddit.Post,
  	<-chan *reddit.Comment,
  	error,
  ) {
  	path := "/u/" + user
  	posts, comments, _, err := streamFromPath(scanner, kill, errs, path)
  	return posts, comments, err
  }
docs: // User returns a stream of new posts and comments made by a user. Each user
  // stream consumes one interval of the handle.