+;;; 36: (2002-12-04) DEFSTRUCT-DESCRIPTION layout changed to accommodate
+;;; correct behaviour of colliding accessors
+;;; 37: (2002-12-09) changed implementation of DEFINE-COMPILER-MACRO,
+;;; deleting %%DEFINE-COMPILER-MACRO
+;;; 38: (2003-01-05) changed names of internal SORT machinery
+;;; 39: (2003-02-20) in 0.7.12.1 a slot was added to
+;;; DEFSTRUCT-SLOT-DESCRIPTION