Bug 18331: Force tt to insert newline to empty_line.inc

Bug 18331: Force tt to insert newline to empty_line.inc

See end of comment #4 and IRC:
http://irc.koha-community.org/koha/2017-08-03#i_1958062

Signed-off-by: Lee Jamison <ldjamison@marywood.edu>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit a10e5383016a5cb4117719ac858cbe02a53e457b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>