Can't pass sleep_fn from retry to Retrier

[pohmelie]

>>> import riprova
>>> import time
>>> def my_sleep(*args, **kwargs): print("my sleep", args, kwargs); time.sleep(*args, **kwargs)
... 
>>> my_sleep(1)
my sleep (1,) {}
>>> def fail(): raise Exception
... 
>>> riprova.retry(backoff=riprova.ConstantBackoff(interval=2, retries=5), sleep_fn=my_sleep)(fail)()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    riprova.retry(backoff=riprova.ConstantBackoff(interval=2, retries=5), sleep_fn=my_sleep)(fail)()
  File "/home/poh/pro/py/riprova/riprova/retry.py", line 132, in wrapper
    return retry_runner(*args, **kw)
  File "/home/poh/pro/py/riprova/riprova/retrier.py", line 294, in run
    delay = self._get_delay()
  File "/home/poh/pro/py/riprova/riprova/retrier.py", line 246, in _get_delay
    self.error)
  File "<string>", line 2, in raise_from
riprova.exceptions.MaxRetriesExceeded: max retries exceeded
>>> 

The reason is identical names for keyword only arguments for decorator and wrapper:
https://github.com/h2non/riprova/blob/master/riprova/retry.py#L24
https://github.com/h2non/riprova/blob/master/riprova/retry.py#L120

[pohmelie]

Actually I discover this when trying to implement #4 so, it will not work for any keyword only argument for retry

[h2non]

Fixed in master.