/usr/share/man/man3/Tcl_DStringFree.3tcl.gz is in tcl8.5-doc 8.5.15-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/DString.3tcl.gz
/usr/share/man/man3/DString.3tcl.gz