Fix autopep8
Fix autopep8

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