Confusion in section 8.7.3. Type Safety

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/17/datatype-enum.html
Description:

In section 8.7.3. Type Safety one can observe a the following statement in
the examples.

INSERT INTO holidays(num_weeks,happiness) VALUES (2, 'sad');

This is somewhat confusing since type happiness doesn't contain 'sad'. I
would suggest to remove the statement or to add an enum 'sad' in type
happiness.