c7ee8560d3
There were some problems when a level.dat contained a non-ascii name, or when a level.dat lived in a directory with a non-ascii name. Paths returned by os.listdir are encoded, so we need to decode them before printing them. When calculating the max length of the enumerated world names, were we for some reason calling str() before taking the len(). The had the effect of converting unicode strings into non-unicode strings, which is not the correct thing to do.