code: def _pretty_message(string, *params):
      
  
      output = textwrap.dedent(string)
  
      # Unwrap lines, taking into account bulleted lists, ordered lists and
      # underlines consisting of = signs
      if output.find('\n') != -1:
          output = re.sub('(?<=\\S)\n(?=[^ \n\t\\d\\*\\-=])', ' ', output)
  
      if params:
          output = output % params
  
      output = output.strip()
  
      return output
docs: Takes a multi-line string and does the following:
  
       - dedents
       - converts newlines with text before and after into a single line
       - strips leading and trailing whitespace
  
      :param string:
          The string to format
  
      :param *params:
          Params to interpolate into the string
  
      :return:
          The formatted string