/usr/share/doc/ is in opensp 1.5.2-10.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc-base/opensp
/usr/share/doc/opensp/
/usr/share/doc/opensp/autoconf.htm
/usr/share/doc/opensp/sgmlsout.htm
/usr/share/doc/opensp/spent.htm
/usr/share/doc/opensp/xml.htm
/usr/share/doc/opensp/catalog.htm
/usr/share/doc/opensp/sysdecl.htm
/usr/share/doc/opensp/spam.htm
/usr/share/doc/opensp/new.htm
/usr/share/doc/opensp/archform.htm
/usr/share/doc/opensp/sgmldecl.htm
/usr/share/doc/opensp/sgmlnorm.htm
/usr/share/doc/opensp/copyright
/usr/share/doc/opensp/features.htm
/usr/share/doc/opensp/generic.htm
/usr/share/doc/opensp/sysid.htm
/usr/share/doc/opensp/ideas.htm
/usr/share/doc/opensp/build.htm
/usr/share/doc/opensp/index.htm
/usr/share/doc/opensp/charset.htm
/usr/share/doc/opensp/xmlwarn.htm
/usr/share/doc/opensp/nsgmls.htm
/usr/share/doc/opensp/spcat.htm
/usr/share/doc/opensp/sx.htm
/usr/share/doc/opensp/README.Debian
/usr/share/doc/opensp/AUTHORS
/usr/share/doc/opensp/NEWS.gz
/usr/share/doc/opensp/releasenotes.html
/usr/share/doc/opensp/releasenotes.ps.gz
/usr/share/doc/opensp/releasenotes.pdf.gz
/usr/share/doc/opensp/README
/usr/share/doc/opensp/changelog.Debian.gz