/usr/lib/cruft/explain/grub-pc-bin is in cruft-common 0.9.25.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 | #!/bin/dash
set -e
dpkg-query -L grub-pc-bin | grep ^/usr/lib/grub | grep -e '\.mod' -e '\.lst' -e '\.o'| sed 's#usr/lib#boot#'
dpkg-query -L grub-pc-bin | grep ^/usr/lib/grub | grep -e '\.img' | sed 's#usr/lib#boot#' | while read o; do if [ -e "$o" ]; then echo "$o"; fi; done
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