Fix for the perl hook 0 evaluation error with perl v5.18.2
initially provided by lomov_vl:
https://bbs.archlinux.org/viewtopic.php?pid=1277245#p1277245

urxvt: perl hook 0 evaluation error: tabbedex
syntax error at tabbedex line 6
syntax error at tabbedex line 681, near "}