Add: Chapter 28. Subclassing Built-ins
Add: Chapter 28. Subclassing Built-ins

syoichi/jser.info,watilde/jser.info,h13i32maru/jser.info,h13i32maru/jser.info,tricknotes/jser.info,tricknotes/jser.info,syoichi/jser.info,watilde/jser.info