/usr/lib/ruby/2.3.0/tkextlib/setup.rb is in ruby2.3-tcltk 2.3.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # frozen_string_literal: false
#
# setup.rb -- setup script before using Tk extension libraries
#
# If you need some setup operations for Tk extensions (for example,
# modify the dynamic library path) required, please write the setup
# operations in this file. This file is required at the last of
# "require 'tk'".
#
|