def lookahead(self, n):
    j = self.i + n
    if j < len(self.s):
      return self.s[j]
    else:
      return ''
Expands collapsed hintmask tokens into two tokens
dataset/ETHPy150Open ardekantur/pyglet/contrib/layout/layout/Plex/Traditional.py/REParser.lookahead--crossover with--dataset/ETHPy150Open googlei18n/compreffor/compreffor/pyCompressor.py/Compreffor.expand_hintmask