code: def wrap_line(line, limit=None, chars=80):
      
      result = []
      builder = []
      length = 0
      if limit is not None:
          sline = line[0:limit]
      else:
          sline = line
          
      for word in sline.split():
          if length <= chars:
              builder.append(word)
              length += len(word) + 1
          else:
              result.append(' '.join(builder))
              builder = [word]
              length = 0
  
      result.append(' '.join(builder))
      return result
docs: Wraps the specified line of text on whitespace to make sure that none of the
      lines' lengths exceeds 'chars' characters.