New argument to defmobject
Add key argument :initialize-when-making to defmobject, which controls whether initialization (by calling reinitialize-instance or some other function) happens when the make-* function defined by this macro is called. Choices are T=yes always NIL=no :default-T=optional (default T) :default-NIL=optional (default NIL) and the default is T to be consistent with previous behavior. This is used in the newly defined defmobject 'permutation.
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