This file is indexed.

/usr/lib/os-probes/mounted/efi/10elilo is in os-prober 1.76~deb9u1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
# Detects ELILO bootloader on a EFI System Partition

. /usr/share/os-prober/common.sh

efi="$1"

found=

elilo=`find $1 -name "elilo.efi"`
if [ -n "$elilo" ]; then
	bdir="${elilo%/*}"
	bdir="${elilo##*/}"
	long="ELILO Boot Manager"
	short="ELILO"
	path=${bdir}/elilo.efi
	found=true
fi  

if [ -n "$found" ]; then
	label="$(count_next_label "$short")"
	result "${path}:${long}:${label}"
fi
exit 0