This file is indexed.

/lib/udev/rules.d/85-keyboard-configuration.rules is in keyboard-configuration 1.70ubuntu5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# Set up a single virtual console.
SUBSYSTEM=="tty", KERNEL=="tty[1-6]", RUN+="console-setup-tty /dev/%k"

# Framebuffer console created.  Set up the font on all virtual consoles
# again.  This races with Plymouth if fbcon is built into the kernel; but
# the worst case should simply be that fonts don't get set up properly.
SUBSYSTEM=="graphics", KERNEL=="fbcon", RUN+="console-setup-tty fbcon"