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parsing command line in roundup-admin shell is not
consistent with command line arguments.  if i run export
from command line like 'roundup-admin export
C:\roundup\export' it works ok, but the same command entered
at roundup-admin prompt raises error shown above.

the culprit is the token module eating up backslashes:

>>> from roundup import token
>>> token.token_split("export C:\\roundup\\export")
['export', 'C:\roundupexport']