why does documentation use "END CASE" when that doesn't work

CASE search-expression   WHEN expression [, expression [ ... ]] THEN     statements [ WHEN expression [, expression [ ... ]] THEN     statements   ... ] [ ELSE     statements ]
END CASE;

And it repeats the "END CASE" phrase in other examples.  

However, that doesn't work.  You have to just use "END".

Shouldn't the documentation be fixed?

Susan