拼写问题

[fodderas]

ch3 中有点拼写问题
worker = self.select_build_worker(vespene.position)
if worker is None:
break
if not self.units(ASSIMILATOR).closer_than(1.0, vespene).exists:
await self.do(worker.build(ASSIMILATOR, vespene))
vespenes 而不是vespene