p4raw-id: //depot/perl@22323
=head2 Reordering of SVt_* constants
The relative ordering of constants that define the various types of C<SV>
-have changed; in particular, C<SVt_PVGV> has been moved ahead of C<SVt_PVLV>,
+have changed; in particular, C<SVt_PVGV> has been moved before C<SVt_PVLV>,
C<SVt_PVAV>, C<SVt_PVHV> and C<SVt_PVCV>. This is unlikely to make any
difference unless you have code that explicitly makes assumptions about that
ordering. (The inheritance hierarchy of C<B::*> objects has been changed