perlhist Perl history records
d perldelta Perl changes since previous version
-D perl5133delta Perl changes in version 5.13.3
+D perl5134delta Perl changes in version 5.13.4
+ perl5133delta Perl changes in version 5.13.3
perl5132delta Perl changes in version 5.13.2
perl5131delta Perl changes in version 5.13.1
perl5130delta Perl changes in version 5.13.0