/usr/lib/ruby/1.9.1/tkextlib/tkHTML.rb is in libtcltk-ruby1.9.1 1.9.3.484-2ubuntu1.
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# TkHtml support
# by Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
#
# call setup script for general 'tkextlib' libraries
require 'tkextlib/setup.rb'
# call setup script
require 'tkextlib/tkHTML/setup.rb'
# load library
require 'tkextlib/tkHTML/htmlwidget'
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