[test] fix test_printable_value_bytes with current pygments
An empty span was added in
https://bitbucket.org/birkenfeld/pygments-main/commits/164574c13533195a555181a2b9c685fea2470403
(grafted from 74b04a88d28a)
#!/bin/sh -e
if [ "$1" = "remove" ]; then
update-rc.d cubicweb remove >/dev/null
fi
if [ "$1" = "purge" ] ; then
rm -rf /etc/cubicweb.d/
rm -rf /var/log/cubicweb/
rm -rf /var/lib/cubicweb/
fi
#DEBHELPER#
exit 0