main() got multiple values for keyword argument

[Oscar Benjamin]

With current master and a script like

# foo.py

from __future__ import print_function

import opster

@opster.command()
def main(arg1,
         opt=('o', False, 'use option'),
         *args):
    print(arg1)
    print(args)

if __name__ == "__main__":
    main.command()

I get the following if I try to call main directly:

>>> import foo
>>> foo.main('a', 'b', 'c')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "opster.py", line 202, in inner
    return call_cmd_regular(func, options_)(*args, **opts)
  File "opster.py", line 890, in inner
    return func(*args, **funckwargs)
TypeError: main() got multiple values for keyword argument 'opt'

Is that a bug? I thought Opster would take care of this but when I actually added it to the doctests in the docs branch it didn't work.