This file is indexed.

/usr/share/man/man3/PRIo8.3avr.gz is in avr-libc 1:1.8.0+Atmel3.4.4-1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/share/man/man3/avr_inttypes.3avr.gz