Sidekiq has several easter eggs, involving emoji code. https://github.com/mperham/sidekiq https://github.com/mperham/sidekiq Those eggs did require fixes from

Sidekiq has several easter eggs, involving emoji code. https://github.com/mperham/sidekiq https://github.com/mperham/sidekiq Those eggs did require fixes from YARD and code linters, in order to support emoji code, so in a sense they helped make the ecosystem better.