/usr/share/man/ is in xxdiff-scripts 1:4.0.1+hg487+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/man/man1/
/usr/share/man/man1/xxdiff-scripts.1.gz
/usr/share/man/man1/svn-foreign.1.gz
/usr/share/man/man1/termdiff.1.gz
/usr/share/man/man1/xx-cond-replace.1.gz
/usr/share/man/man1/xx-cvs-diff.1.gz
/usr/share/man/man1/xx-cvs-revcmp.1.gz
/usr/share/man/man1/xx-diff-proxy.1.gz
/usr/share/man/man1/xx-encrypted.1.gz
/usr/share/man/man1/xx-filter.1.gz
/usr/share/man/man1/xx-find-grep-sed.1.gz
/usr/share/man/man1/xx-hg-merge.1.gz
/usr/share/man/man1/xx-match.1.gz
/usr/share/man/man1/xx-p4-unmerge.1.gz
/usr/share/man/man1/xx-pyline.1.gz
/usr/share/man/man1/xx-rename.1.gz
/usr/share/man/man1/xx-sql-schemas.1.gz
/usr/share/man/man1/xx-svn-diff.1.gz
/usr/share/man/man1/xx-svn-resolve.1.gz
/usr/share/man/man1/xx-svn-review.1.gz