Compatibility tests for C<sub : attrs> vs the older C<use attrs>.
+=item lib/env
+
+Tests for new environment scalar capability (e.g., C<use Env qw($BAR);>).
+
+=item lib/env-array
+
+Tests for new environment array capability (e.g., C<use Env qw(@PATH);>).
+
=item lib/io_const
IO constants (SEEK_*, _IO*).
$PERL_VERSION now stands for C<$^V> (a string value) rather than for C<$]>
(a numeric value).
+=item Env
+
+Env now supports accessing environment variables like PATH as array
+variables.
+
=item ExtUtils::MakeMaker
change#4135, also needs docs in module pod