old_contents: import argparse
  from datetime import datetime
  
  
  def utc_timestamp(value):
      try:
          return datetime.strptime(value, '%Y-%m-%d %H:%M:%S')
      except (ValueError, TypeError):
          raise argparse.ArgumentTypeError(
              "Invalid datetime specified: '%s'. "
              "Expected UTC timestamp in the format: YYYY-MM-DD HH:MM:SS" % value
          )
  
  
  def date_type(value):
      try:
          return datetime.strptime(value, '%Y-%m-%d').date()
      except (ValueError, TypeError):
          raise argparse.ArgumentTypeError(
              "Invalid date specified: '%s'. "
              "Expected date in the format: YYYY-MM-DD" % value
          )
  
  
  # NOTE: The `validate_integer` function has been renamed to `validate_range`,
  # and it no longer enforces the argument type. This requires specifying the
  # argument type (for non-default types) when using `action=validate_range(...)`.
  # To compare, the previous function could be used as such:
  #
  #   parser.add_argument("value", action=validate_integer(gt=0))
  #
  # Using the new function, `type` must be specified as well:
  #
  #   parser.add_argument("value", type=int, action=validate_range(gt=0))
  #
  def validate_range(gt=None, lt=None):
      """Create an argparse.Action subclass for validating comparable inputs.
  
      :param gt: value which the argument cannot be greater than
      :param lt: value which the argument cannot be less than
      :returns: argparse.Action subclass
  
      Example:
      parser.add_argument('--fraction', action=validate_range(gt=0.0, lt=1.0),
          type=float, help="Number between 0 and 1")
      """
  
      class ValidateRange(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
  
              if gt is not None and gt >= values:
                  raise argparse.ArgumentError(self, f"Must be greater than {gt}")
  
              if lt is not None and lt <= values:
                  raise argparse.ArgumentError(self, f"Must be less than {lt}")
  
              setattr(namespace, self.dest, values)
  
      return ValidateRange
  
new_contents: import argparse
  from datetime import datetime
  
  
  def utc_timestamp(value):
      try:
          return datetime.strptime(value, '%Y-%m-%d %H:%M:%S')
      except (ValueError, TypeError):
          raise argparse.ArgumentTypeError(
              "Invalid datetime specified: '%s'. "
              "Expected UTC timestamp in the format: YYYY-MM-DD HH:MM:SS" % value
          )
  
  
  def date_type(value):
      try:
          return datetime.strptime(value, '%Y-%m-%d').date()
      except (ValueError, TypeError):
          raise argparse.ArgumentTypeError(
              "Invalid date specified: '%s'. "
              "Expected date in the format: YYYY-MM-DD" % value
          )
  
  
  # NOTE: The `validate_integer` function has been renamed to `validate_range`,
  # and it no longer enforces the argument type. This requires specifying the
  # argument type (for non-default types) when using `action=validate_range(...)`.
  # To compare, the previous function could be used as such:
  #
  #   parser.add_argument("value", action=validate_integer(gt=0))
  #
  # Using the new function, `type` must be specified as well:
  #
  #   parser.add_argument("value", type=int, action=validate_range(gt=0))
  #
  def validate_range(gt=None, lt=None):
      """Create an argparse.Action subclass for validating comparable inputs.
  
      :param gt: value which the argument must be greater than
      :param lt: value which the argument must be less than
      :returns: argparse.Action subclass
  
      Example:
      parser.add_argument('--fraction', action=validate_range(gt=0.0, lt=1.0),
          type=float, help="Number between 0 and 1")
      """
  
      class ValidateRange(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
  
              if gt is not None and gt >= values:
                  raise argparse.ArgumentError(self, f"Must be greater than {gt}")
  
              if lt is not None and lt <= values:
                  raise argparse.ArgumentError(self, f"Must be less than {lt}")
  
              setattr(namespace, self.dest, values)
  
      return ValidateRange
  
subject: Fix grammar