Separate names with a comma.
I think that this is intended to be there. I will see about getting it added. Thanks for reporting!
I'm not exactly sure if you are saying that it isn't there but if you are I'd like to point out that it is on the front page of the wiki.
oops sorry. It's there now :P
This page has every command you will ever need. http://www.ecocitycraft.com/wiki/index.php?title=Server_Commands