old_contents: from jinja2 import Markup
  
  
  def null_formatter(value):
      """
          Return `NULL` as the string for `None` value
  
          :param value:
              Value to check
      """
      return Markup('<i>NULL</i>')
  
  
  def empty_formatter(value):
      """
          Return empty string for `None` value
  
          :param value:
              Value to check
      """
      return ''
  
  
  def bool_formatter(value):
      """
          Return check icon if value is `True` or empty string otherwise.
  
          :param value:
              Value to check
      """
      return Markup('<i class="icon-ok"></i>' if value else '')
  
  
  DEFAULT_FORMATTERS = {
      type(None): empty_formatter,
      bool: bool_formatter
  }
  
new_contents: from jinja2 import Markup
  
  
  def null_formatter(value):
      """
          Return `NULL` as the string for `None` value
  
          :param value:
              Value to check
      """
      return Markup('<i>NULL</i>')
  
  
  def empty_formatter(value):
      """
          Return empty string for `None` value
  
          :param value:
              Value to check
      """
      return ''
  
  
  def bool_formatter(value):
      """
          Return check icon if value is `True` or empty string otherwise.
  
          :param value:
              Value to check
      """
      return Markup('<i class="icon-ok"></i>' if value else '')
  
  
  def list_formatter(values):
      """
          Return string with comma separated values
  
          :param values:
              Value to check
      """
      return u', '.join(values)
  
  
  DEFAULT_FORMATTERS = {
      type(None): empty_formatter,
      bool: bool_formatter,
      list: list_formatter,
  }
  
subject: Add extra type formatter for `list` type