code: def truncate_empty_lines(lines):
      
      while lines[0].rstrip() == '':
          lines.pop(0)
      while lines[len(lines) - 1].rstrip() == '':
          lines.pop(-1)
      return lines
docs: Removes all empty lines from above and below the text.
  
      We can't just use text.strip() because that would remove the leading
      space for the table.
  
      Parameters
      ----------
      lines : list of str
  
      Returns
      -------
      lines : list of str
          The text lines without empty lines above or below