# File lib/hammer_cli/options/normalizers.rb, line 168
        def format(value)
          if @allowed_values.include? value
            value
          else
            if allowed_values.count == 1
              msg = _("value must be %s") % quoted_values
            else
              msg = _("value must be one of %s") % quoted_values
            end
            raise ArgumentError, msg
          end
        end