p4raw-id: //depot/perl@29091
=back
+=head2 The C<_> prototype
+
+A new prototype character has been added. C<_> is equivalent to C<$> (it
+denotes a scalar), but defaults to C<$_> if the corresponding argument
+isn't supplied. Due to the optional nature of the argument, you can only
+use it at the end of a prototype, or before a semicolon.
+
=head1 Modules and Pragmas
=head2 New Core Modules
+=head2 Module changes
+
+=over 4
+
+=item C<base>
+
+The C<base> pragma now warns if a class tries to inherit from itself.
+
+=back
+
=head1 Utility Changes
=head1 Documentation