Chapter 1 typos.

[Patrick H Dussud <DUSSUD%jenner.csc.ti.com@RELAY.CS.NET>]

1-12 First defclass, ) missing.

1-24 Second paragraph, "When a method combination type is defined using
the short form of DEFINE-METHOD-COMBINATION, primary methods are defined
to include not only the methods qualified with the same name of the type
of method combination, but certain others as well". This is not true.
Primary methods include only those qualified with the name of the method
combination type.

Patrick.