code: def uncomment_lines(lines):
      
      ret = []
      for line in lines:
          ws_prefix, rest, ignore = RE_LINE_SPLITTER_UNCOMMENT.match(line).groups()
          ret.append(ws_prefix + rest)
      return ''.join(ret)
docs: Uncomment the given list of lines and return them.  The first hash mark
      following any amount of whitespace will be removed on each line.