positional args after kwargs doesn't throw SyntaxError

If I call

``` python
def testfun(arg1=1,arg2=2):
    print(arg1,arg2)
```

as `testfun(arg1='one','two')` in CPython3.3 it throws `SyntaxError: non-keyword arg after keyword arg`.
But doing the same in micropython instead throws `TypeError: function does not take keyword arguments`.
