/usr/share/tcltk/tcllib1.16/base32/pkgIndex.tcl is in tcllib 1.16-dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | if {![package vsatisfies [package provide Tcl] 8.4]} return
package ifneeded base32 0.1 [list source [file join $dir base32.tcl]]
package ifneeded base32::hex 0.1 [list source [file join $dir base32hex.tcl]]
package ifneeded base32::core 0.1 [list source [file join $dir base32core.tcl]]
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