/usr/share/doc/libdesktopcouch-glib-1.0-2/changelog.Debian.gz is in libdesktopcouch-glib-1.0-2 0.7.4-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libdesktopcouch-glib-1.0-2/../libcouchdb-glib-1.0-2/changelog.Debian.gz