/usr/share/doc/gnomemm-2.6/libglademm-2.4 is in libglademm-2.4-doc 2.6.7-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gnomemm-2.6/../libglademm-2.4-doc
/usr/share/doc/gnomemm-2.6/../libglademm-2.4-doc