/usr/share/help/de/devhelp/index.page is in devhelp-common 3.28.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/de/devhelp/../../../help-langpack/de/devhelp/index.page
/usr/share/help/de/devhelp/../../../help-langpack/de/devhelp/index.page