respectively change and preserve the value.
* fixed bug 63: the code walker, part of the implementation of CLOS,
is better at handling symbol macros.
+ * bug fix: there is no longer a type named LENGTH. (reported by
+ Raymond Toy)
* fixed some bugs revealed by Paul Dietz' test suite:
** NIL is now allowed as a structure slot name.
** arbitrary numbers, not just reals, are allowed in certain
** FIND-METHOD signals an error if the lengths of the specializers
is incompatible with the generic function, even if the ERRORP
argument is true.
+ ** TYPE-OF returns recognizeable subtypes of all built-in-types of
+ which its argument is a member.
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles