This file is indexed.

/usr/lib/grub/x86_64-efi/terminal.lst is in grub-efi-amd64-bin 2.02~beta2-9.

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

The actual contents of the file can be viewed below.

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iat_keyboard: at_keyboard
iserial: serial
iserial_*: serial
oaudio: morse
ocbmemc: cbmemc
ogfxterm: gfxterm
oserial: serial
oserial_*: serial
ospkmodem: spkmodem