This file is indexed.

preinst is in apt-listchanges 2.85.13ubuntu2.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh -e

set -e

hook=/etc/apt/apt.conf.d/20listchanges
test -f $hook.disabled && mv $hook.disabled $hook



exit 0