/usr/share/lintian/overrides/python-nautilus is in python-nautilus 1.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # System-wide directory where extensions must be added
python-nautilus: package-contains-empty-directory usr/share/nautilus-python/extensions/
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