old_contents: from django.template import Library
  from django.utils.encoding import force_unicode
  import re
  
  register = Library()
  re_widont = re.compile(r'\s+(\S+\s*)$')
  re_widont_html = re.compile(r'([^<>\s])\s+([^<>\s]+\s*)(</?(?:address|blockquote|br|dd|div|dt|fieldset|form|h[1-6]|li|noscript|p|td|th)[^>]*>|$)', re.IGNORECASE)
  
  
  def widont(value, count=1):
      """
      Adds an HTML non-breaking space between the final two words of the string to
      avoid "widowed" words.
  
      Examples:
  
      >>> print(widont('Test   me   out'))
      Test   me&nbsp;out
  
      >>> widont('It works with trailing spaces too  ')
      u'It works with trailing spaces&nbsp;too  '
  
      >>> print(widont('NoEffect'))
      NoEffect
      """
      def replace(matchobj):
          return force_unicode('&nbsp;%s' % matchobj.group(1))
      for i in range(count):
          value = re_widont.sub(replace, force_unicode(value))
      return value
  
  
  def widont_html(value):
      """
      Adds an HTML non-breaking space between the final two words at the end of
      (and in sentences just outside of) block level tags to avoid "widowed"
      words.
  
      Examples:
  
      >>> print(widont_html('<h2>Here is a simple  example  </h2> <p>Single</p>'))
      <h2>Here is a simple&nbsp;example  </h2> <p>Single</p>
  
      >>> print(widont_html('<p>test me<br /> out</p><h2>Ok?</h2>Not in a p<p title="test me">and this</p>'))
      <p>test&nbsp;me<br /> out</p><h2>Ok?</h2>Not in a&nbsp;p<p title="test me">and&nbsp;this</p>
  
      >>> print(widont_html('leading text  <p>test me out</p>  trailing text'))
      leading&nbsp;text  <p>test me&nbsp;out</p>  trailing&nbsp;text
      """
      def replace(matchobj):
          return force_unicode('%s&nbsp;%s%s' % matchobj.groups())
      return re_widont_html.sub(replace, force_unicode(value))
  
  register.filter(widont)
  register.filter(widont_html)
  
  if __name__ == "__main__":
      def _test():
          import doctest
          doctest.testmod()
      _test()
  
new_contents: from django.template import Library
  from django.utils.encoding import force_text
  import re
  
  register = Library()
  re_widont = re.compile(r'\s+(\S+\s*)$')
  re_widont_html = re.compile(r'([^<>\s])\s+([^<>\s]+\s*)(</?(?:address|blockquote|br|dd|div|dt|fieldset|form|h[1-6]|li|noscript|p|td|th)[^>]*>|$)', re.IGNORECASE)
  
  
  def widont(value, count=1):
      """
      Adds an HTML non-breaking space between the final two words of the string to
      avoid "widowed" words.
  
      Examples:
  
      >>> print(widont('Test   me   out'))
      Test   me&nbsp;out
  
      >>> widont('It works with trailing spaces too  ')
      u'It works with trailing spaces&nbsp;too  '
  
      >>> print(widont('NoEffect'))
      NoEffect
      """
      def replace(matchobj):
          return force_text('&nbsp;%s' % matchobj.group(1))
      for i in range(count):
          value = re_widont.sub(replace, force_text(value))
      return value
  
  
  def widont_html(value):
      """
      Adds an HTML non-breaking space between the final two words at the end of
      (and in sentences just outside of) block level tags to avoid "widowed"
      words.
  
      Examples:
  
      >>> print(widont_html('<h2>Here is a simple  example  </h2> <p>Single</p>'))
      <h2>Here is a simple&nbsp;example  </h2> <p>Single</p>
  
      >>> print(widont_html('<p>test me<br /> out</p><h2>Ok?</h2>Not in a p<p title="test me">and this</p>'))
      <p>test&nbsp;me<br /> out</p><h2>Ok?</h2>Not in a&nbsp;p<p title="test me">and&nbsp;this</p>
  
      >>> print(widont_html('leading text  <p>test me out</p>  trailing text'))
      leading&nbsp;text  <p>test me&nbsp;out</p>  trailing&nbsp;text
      """
      def replace(matchobj):
          return force_text('%s&nbsp;%s%s' % matchobj.groups())
      return re_widont_html.sub(replace, force_text(value))
  
  register.filter(widont)
  register.filter(widont_html)
  
  if __name__ == "__main__":
      def _test():
          import doctest
          doctest.testmod()
      _test()
  
subject: Use django.utils.encoding.force_text instead