/usr/share/doc/libcomerr2/ is in comerr-dev 2.1-1.42-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libcomerr2/com_err.texi.gz
/usr/share/doc/libcomerr2/examples/
/usr/share/doc/libcomerr2/examples/ext2_err.et.gz
/usr/share/doc/libcomerr2/examples/ss_err.et
/usr/share/doc/libcomerr2/html-info/
/usr/share/doc/libcomerr2/html-info/com_err_0.html
/usr/share/doc/libcomerr2/html-info/com_err_1.html
/usr/share/doc/libcomerr2/html-info/com_err_2.html
/usr/share/doc/libcomerr2/html-info/com_err_3.html
/usr/share/doc/libcomerr2/html-info/com_err_4.html
/usr/share/doc/libcomerr2/html-info/com_err_5.html
/usr/share/doc/libcomerr2/html-info/com_err_6.html
/usr/share/doc/libcomerr2/html-info/com_err_7.html
/usr/share/doc/libcomerr2/html-info/com_err_8.html
/usr/share/doc/libcomerr2/html-info/com_err_abt.html
/usr/share/doc/libcomerr2/html-info/com_err_toc.html