/usr/share/doc/ruby-graphviz/examples/sample31.rb is in ruby-graphviz 1.0.8-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #!/usr/bin/ruby
$:.unshift( "../lib" );
require "graphviz"
GraphViz.new(:g){ |g|
a = g.add_nodes( "A:B:C", :shape => :record )
b = g.add_nodes( "D:E:F", :shape => :ellipse )
a << b
}.save( :png => "#{$0}.png" )
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