This file is indexed.

/lib/udev/rules.d/60-evdev.rules is in udev 232-25+deb9u8.

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

The actual contents of the file can be viewed below.

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# do not edit this file, it will be overwritten on update

ACTION=="remove", GOTO="evdev_end"
KERNEL!="event*", GOTO="evdev_end"

# skip later rules when we find something for this input device
IMPORT{builtin}="hwdb --subsystem=input --lookup-prefix=evdev:", \
  RUN{builtin}+="keyboard", GOTO="evdev_end"

# AT keyboard matching by the machine's DMI data
ENV{ID_INPUT_KEY}=="?*", DRIVERS=="atkbd", \
  IMPORT{builtin}="hwdb 'evdev:atkbd:$attr{[dmi/id]modalias}'", \
  RUN{builtin}+="keyboard", GOTO="evdev_end"

# device matching the input device name and the machine's DMI data
KERNELS=="input*", IMPORT{builtin}="hwdb 'evdev:name:$attr{name}:$attr{[dmi/id]modalias}'", \
  RUN{builtin}+="keyboard", GOTO="evdev_end"

LABEL="evdev_end"