Add __init__(... *, ...) to docstring of extensions.Evaluator
Add __init__(... *, ...) to docstring of extensions.Evaluator

chainer/chainer,okuta/chainer,okuta/chainer,chainer/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,chainer/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,okuta/chainer,niboshi/chainer,hvy/chainer,hvy/chainer,niboshi/chainer,wkentaro/chainer,chainer/chainer,pfnet/chainer,okuta/chainer,wkentaro/chainer