This file is indexed.

/usr/share/xml/entities/xhtml/xhtml-symbol.ent is in w3c-dtd-xhtml 1.1-5ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/share/xml/entities/xhtml/../../xhtml/schema/dtd/1.0/xhtml-symbol.ent