dym_demo.rb

#!/usr/bin/env ruby

versions = (3..7).map{ |minor| "2.#{minor}" }

versions.each do |version|
  cmd = <<~HERE
    $stdout.write "defined?(DidYouMean) == "
    $stdout.write defined?(DidYouMean).inspect
    $stdout.write "\\n"
    $stdout.write "defined?(DidYouMean::Levenshtein) == "
    $stdout.write defined?(DidYouMean::Levenshtein).inspect
  HERE
  cmd = cmd.split("\n").join(';')
  puts `docker run --rm ruby:#{version} ruby --version`
  puts `docker run --rm ruby:#{version} ruby -e '#{cmd}'`
  puts '====='
end

Output

ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-linux]
defined?(DidYouMean) == "constant"
defined?(DidYouMean::Levenshtein) == "constant"
=====
ruby 2.4.10p364 (2020-03-31 revision 67879) [x86_64-linux]
defined?(DidYouMean) == "constant"
defined?(DidYouMean::Levenshtein) == "constant"
=====
ruby 2.5.8p224 (2020-03-31 revision 67882) [x86_64-linux]
defined?(DidYouMean) == "constant"
defined?(DidYouMean::Levenshtein) == "constant"
=====
ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-linux]
defined?(DidYouMean) == "constant"
defined?(DidYouMean::Levenshtein) == "constant"
=====
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux]
defined?(DidYouMean) == "constant"
defined?(DidYouMean::Levenshtein) == "constant"
=====