Small additional suggestion wrt Method-combination

[Danny Bobrow <Bobrow.pa@Xerox.COM>]

Because :operator and :call-next-method (nee :around) cannot both
appear, I suggest that the syntax of make-method-call be

(make-method-call method-list &optional
     (operator 'progn)
     (identity-with-one-argument (eq operator 'progn)))

Where if operator has the value :call-next-method, it has the same
effect as previously providing that argument with t as its value.


  danny