I can't believe I had missed this, but one difference I've found is that F21 has moved to bash-4.3, while F20 is using 4.2. Then I came across this post by Chet Ramey, the maintainer of bash, and I got confused: http://lists.gnu.org/archive/html/bug-bash/2013-07/msg00096.html -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
