This file is indexed.

prerm is in bison 2:3.0.2.dfsg-2.

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

case "$1" in
    upgrade|failed-upgrade)
	:;
	;;
 
    remove|deconfigure)
	update-alternatives --remove yacc /usr/bin/bison.yacc
	;;
 
    *)
	echo "Undocumented call: \"$@\"" >&2
	exit 1
	;;
esac