/usr/share/man/man1/pyvenv.1.gz is in python3-venv 3.4.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/pyvenv-3.4.1.gz
/usr/share/man/man1/pyvenv-3.4.1.gz