module I18n::MissingTranslation::Base

def message
  if (default = options[:default]).is_a?(Array) && default.any?
    other_options = ([key, *default]).map { |k| normalized_option(k).prepend('- ') }.join("\n")
    "Translation missing. Options considered were:\n#{other_options}"
  else
    "Translation missing: #{keys.join('.')}"
  end
end