constant.pm: Note that list constants are not

diff --git a/dist/constant/lib/constant.pm b/dist/constant/lib/constant.pm
index ee5e376..5767728 100644 (file)
--- a/dist/constant/lib/constant.pm
+++ b/dist/constant/lib/constant.pm
@@ -368,6 +368,8 @@ used.
 =head1 CAVEATS
 
 List constants are not inlined unless you are using Perl v5.20 or higher.
+In v5.20 or higher, they are still not read-only, but that may change in
+future versions.
 
 It is not possible to have a subroutine or a keyword with the same
 name as a constant in the same package. This is probably a Good Thing.