https://bugzilla.redhat.com/show_bug.cgi?id=1288731
--- Comment #20 from Zbigniew Jędrzejewski-Szmek zbyszek@in.waw.pl ---
The block you suggest won't work
Nah, the wiki is wrong. Somebody updated the macros to merge with previous values (see the example in comment #17). Somebody should file a FPC ticket to update the wiki.