This file is indexed.

/usr/share/man/man3/Tcl_UtfToExternalDString.3tcl.gz is in tcl8.6-doc 8.6.1-4ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/share/man/man3/Tcl_GetEncoding.3tcl.gz