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/usr/share/liblouis/tables/controlchars.cti is in liblouis-data 2.5.3-2ubuntu1.5.

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# liblouis: some control characters

#  Based on the Linux screenreader BRLTTY, copyright (C) 1999-2006 by
#  The BRLTTY Team
#
#  Copyright (C) 2004, 2005, 2013
#  ViewPlus Technologies, Inc. www.viewplus.com
#  and
#  Abilitiessoft, Inc. www.abilitiessoft.com
#  All rights reserved
#
#  This file is free software; you can redistribute it and/or modify it
#   under the terms of the Lesser or Library GNU General Public License 
#  as published by the
#  Free Software Foundation; either version 3, or (at your option) any
#  later version.
# 
#  This file is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
#  Library GNU General Public License for more details.
#
#  You should have received a copy of the Library GNU General Public 
#  License along with this program; see the file COPYING.  If not, write 
#  to
#  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
#  Boston, MA 02110-1301, USA.
#
#  Maintained by John J. Boyer john.boyer@abilitiessoft.com

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