This file is indexed.

/usr/share/doc/dialog/examples/msgbox4-utf8 is in dialog 1.3-20160209-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
# $Id: msgbox4-utf8,v 1.10 2010/01/13 10:20:03 tom Exp $

. ./setup-vars

. ./setup-utf8

width=30
while test $width != 61
do
$DIALOG --title "MESSAGE BOX (width $width)" --no-collapse "$@" \
        --msgbox "\
This sample is written in UTF-8.
There are several checking points:
(1) whether the fullwidth characters are displayed well or not,
(2) whether the width of characters are evaluated properly, and
(3) whether the character at line-folding is lost or not.

あいうえおかきくけこさしすせそたちつてとなにぬねの
1234567890123456789012345
ABCDEFGHIJKLMNOPQRSTUVWXY

Hi, this is a simple message box.  You can use this to \
display any message you like.  The box will remain until \
you press the ENTER key." 22 $width
retval=$?

case $retval in
  $DIALOG_CANCEL)
    echo "Cancel pressed.";exit;;
  $DIALOG_ESC)
    echo "ESC pressed.";exit;;
esac

width=`expr $width + 1`

done