gherkin recently started to use ruby-beautify, but this gem is no longer maintained and contains bugs that will not be fixed. See https://github.com/erniebrodeur/ruby-beautify/issues/3 for a notification about this and possible alternatives.
Thanks for the heads up. I don't think it matters to gherkin. ruby-beautify is a build-time dependency, not a runtime one. It does the job (get rid of warnings). See f172c768adcd4b7dd5a3dafb5cbc088c8b1463c2
gherkin recently started to use ruby-beautify, but this gem is no longer maintained and contains bugs that will not be fixed. See https://github.com/erniebrodeur/ruby-beautify/issues/3 for a notification about this and possible alternatives.