/usr/share/man/man3/ggiWmhDetach.3.gz is in libggiwmh0-dev 0.3.2-2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/ggiWmhInit.3.gz
/usr/share/man/man3/ggiWmhInit.3.gz