Apply suggestions from code review
Apply suggestions from code review

Co-authored-by: Yuki Okushi <85857f4af0f1ba28967e979a9055a2f74102998d@gmail.com>
phil-opp/blogOS,phil-opp/blog_os,phil-opp/blog_os,phil-opp/blogOS,phil-opp/blog_os,phil-opp/blog_os