which is much more efficient. (Yves Orton)
+=item Vertical and horizontal whitespace, and linebreak
+
+Regular expressions now recognize the C<\v> and C<\h> escapes, that match
+vertical and horizontal whitespace, respectively. C<\V> and C<\H>
+logically match their complements.
+
+C<\R> matches a generic linebreak, that is, vertical whitespace, plus
+the multi-character sequence C<"\x0D\x0A">.
+
=back
=head2 The C<_> prototype
available: the C3 algorithm. See L<mro> for more information.
(Brandon Black)
+=head2 bignum, bigint, bigrat
+
+The three numeric pragmas C<bignum>, C<bigint> and C<bigrat> are now
+lexically scoped. (Tels)
+
=head2 New Core Modules
=over 4
=over 4
+=item C<assertions>
+
+The C<assertions> pragma, its submodules C<assertions::activate> and
+C<assertions::compat> and the B<-A> command-line switch have been removed.
+The interface was not judged mature enough for inclusion in a stable
+release.
+
=item C<base>
The C<base> pragma now warns if a class tries to inherit from itself.
Duping a filehandle which has the C<:utf8> PerlIO layer set will now
properly carry that layer on the duped filehandle. (Rafael)
+Localizing an hash element whose key was given as a variable didn't work
+correctly if the variable was changed while the local() was in effect (as
+in C<local $h{$x}; ++$x>). (Bo Lindbergh)
+
=head1 New or Changed Diagnostics
=head2 Deprecations