Copying https://bug.cfengine.com/bugtracker/view.php?id=1056 to the new tracking system.
Allowing whitespace in class expressions could make long class expressions more readable.
( ipv4_10_10_10 | ipv4_10_10_11 | ipv4_10_10_12 ) &
( ! epel_repo_is_installed ) ::
One of the main goals of CFEngine 3 is to enhance Knowledge Management, and making long class expressions easier for human eyes to read would further that goal.
This especially matters for long or complex class expressions (compound expressions).
Thanks again for a great product.