This file is indexed.

postinst is in ack-grep 2.14-4.

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

set -e

if dpkg-maintscript-helper supports rm_conffile; then
	dpkg-maintscript-helper rm_conffile \
		/etc/bash_completion.d/ack-grep 2.04-2~ ack-grep -- "$@"
fi