Python Wikipedia Robot Framework

replace.py -help throws following exception after common bot help (the
replace.py specific help is not shown):

Traceback (most recent call last):
File "D:\Work\pywikipedia\replace.py", line 705, in <module>
main()
File "D:\Work\pywikipedia\replace.py", line 510, in main
for arg in wikipedia.handleArgs(*args):
File "D:\Work\pywikipedia\wikipedia.py", line 6535, in handleArgs
showHelp(moduleName)
File "D:\Work\pywikipedia\wikipedia.py", line 7005, in showHelp
helpText = helpText.replace(key, value.strip('\n\r'))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 852:
ordinal not in range(128)

Thanks.