5 opens = set(['(', '{', '['])
6 closes = set([')', '}', ']'])
16 if blank and before is not None and before[-1:] not in opens and after[:1] not in closes:
17 sys.stdout.write('\n')
18 sys.stdout.write(i + '\n')
20 before = i if j == -1 else i[:j].rstrip()