This file is indexed.

/etc/brltty/common.tti is in brltty 5.0-2ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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###############################################################################
# BRLTTY - A background process providing access to the console screen (when in
#          text mode) for a blind person using a refreshable braille display.
#
# Copyright (C) 1995-2014 by The BRLTTY Developers.
#
# BRLTTY comes with ABSOLUTELY NO WARRANTY.
#
# This is free software, placed under the terms of the
# GNU Lesser General Public License, as published by the Free Software
# Foundation; either version 2.1 of the License, or (at your option) any
# later version. Please see the file LICENSE-LGPL for details.
#
# Web Page: http://mielke.cc/brltty/
#
# This software is maintained by Dave Mielke <dave@mielke.cc>.
###############################################################################

# This BRLTTY text subtable is included by all general purpose text tables. Its
# sole purpose is to be a common place wherein to include text subtables which
# define braille representations that are generally useful in all contexts.

# space characters
include spaces.tti

# box drawing characters
include boxes.tti

# block characters
include blocks.tti