Quoth Porting/release_managers_guide.pod:
"Edit F<pod.lst>: add the new entry, flagged as 'd', and unflag
the previous entry from being 'd'; for example:
-d perl5101delta Perl changes in version 5.10.1
+d perl5102delta Perl changes in version 5.10.2
+ perl5101delta Perl changes in version 5.10.1"
perlhist Perl history records
D perldelta Perl changes since previous version
-d perl51310delta Perl changes in version 5.13.10
+d perl51311delta Perl changes in version 5.13.11
+ perl51310delta Perl changes in version 5.13.10
perl5139delta Perl changes in version 5.13.9
perl5138delta Perl changes in version 5.13.8
perl5137delta Perl changes in version 5.13.7