This file is indexed.

prerm is in llvm-3.1-runtime 3.1-2ubuntu1~12.04.1.

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

if test "$1" = "remove"; then
    if test -x /usr/sbin/update-binfmts; then
        update-binfmts --package llvm \
            --remove llvm /usr/bin/lli-3.1 || true
    fi
fi