[fix] docstring
[fix] docstring

anaruse/chainer,keisuke-umezawa/chainer,tkerola/chainer,niboshi/chainer,niboshi/chainer,ktnyt/chainer,ktnyt/chainer,ktnyt/chainer,pfnet/chainer,hvy/chainer,chainer/chainer,jnishi/chainer,okuta/chainer,wkentaro/chainer,hvy/chainer,ktnyt/chainer,keisuke-umezawa/chainer,wkentaro/chainer,hvy/chainer,wkentaro/chainer,chainer/chainer,chainer/chainer,jnishi/chainer,chainer/chainer,keisuke-umezawa/chainer,niboshi/chainer,niboshi/chainer,rezoo/chainer,okuta/chainer,wkentaro/chainer,okuta/chainer,ronekko/chainer,okuta/chainer,hvy/chainer,jnishi/chainer,keisuke-umezawa/chainer,jnishi/chainer