Fix doctest of ConcatWithAsyncTransfer
Fix doctest of ConcatWithAsyncTransfer

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