This file is indexed.

preinst is in criticalmass-data 1:1.0.0-1.4ubuntu1.

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

# Older versions shipped a symlink; remove it.
if [ "$1" = upgrade ] && dpkg --compare-versions "$2" lt "1:0.9.12-5"; then
	rm -f /usr/share/doc/criticalmass-data
fi