Bug 16682: (followup) Fix display if Batch patron modification tool does not get...

Bug 16682: (followup) Fix display if Batch patron modification tool does not get any patrons

Format message as proposed in comment #8

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 5a1f3acaabf235733a3e7a98d16d0395df1980b8)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit c27ba3c7bd41f51a9da871db47b93fa6c4ad60a0)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>