/usr/lib/ruby/1.8/tkscrollbox.rb is in libtcltk-ruby1.8 1.8.7.352-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | #
# tkscrollbox.rb - load tk/scrollbox.rb
#
require 'tk/scrollbox'
|