/usr/share/doc/kde/HTML/en/kwatchgnupg/common is in kleopatra 4:4.14.1-1+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/kde/HTML/en/kwatchgnupg/../common
/usr/share/doc/kde/HTML/en/kwatchgnupg/../common