[otrs] Tag <OTRS_CUSTOMER_REALNAME> wrongly documented or implemented?

Hi, in the tag reference at the bottom of the "Edit Notification" page in OTRS 5.0.9 the tag "" is described as "To get the realname of the sender (if given).". Effectively, it is replaced by the name of the ticket customer but *not* by the name of the effective sender (which could e.g. be a third party answering to a Cc received from that ticket). So either the tag name is misleading (should rather be something like "OTRS_SENDER_REALNAME") and the replacement is buggy or the documentation is wrong (should rather read "To get the realname of the ticket's customer user (if given)."). Any thoughts on this? Cheers Frank