The diff fixes a single spelling error in doc/site/classes.markdown, changing the misspelled word "clreate" to the correct "create" in the sentence warning against inheriting from built-in types.
Add a warning to the classes documentation page explaining that users should not create classes inheriting from built-in types (Bool, Num, String, Range, List) due to internal bit representation conflicts that cause confusion when invoking inherited methods on derived types.