/usr/share/doc/dialog/examples/setup-edit is in dialog 1.3-20160828-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #!/bin/sh
# $Id: setup-edit,v 1.3 2016/01/26 22:42:44 tom Exp $
# vile:shmode
input=`tempfile 2>/dev/null` || input=/tmp/input$$
output=`tempfile 2>/dev/null` || output=/tmp/test$$
trap "rm -f $input $output" $SIG_NONE $SIG_HUP $SIG_INT $SIG_QUIT $SIG_TERM
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