class RSpec::Support::MethodSignature

def non_kw_args_arity_description
  case max_non_kw_args
  when min_non_kw_args then min_non_kw_args.to_s
  when INFINITY then "#{min_non_kw_args} or more"
  else "#{min_non_kw_args} to #{max_non_kw_args}"
  end
end