Fix doctest for training data
Fix doctest for training data

ysekky/chainer,jnishi/chainer,keisuke-umezawa/chainer,ronekko/chainer,delta2323/chainer,wkentaro/chainer,ktnyt/chainer,hvy/chainer,niboshi/chainer,kashif/chainer,wkentaro/chainer,okuta/chainer,chainer/chainer,rezoo/chainer,wkentaro/chainer,okuta/chainer,keisuke-umezawa/chainer,tkerola/chainer,niboshi/chainer,niboshi/chainer,ktnyt/chainer,jnishi/chainer,hvy/chainer,cupy/cupy,keisuke-umezawa/chainer,anaruse/chainer,keisuke-umezawa/chainer,hvy/chainer,kiyukuta/chainer,chainer/chainer,niboshi/chainer,wkentaro/chainer,hvy/chainer,cupy/cupy,cupy/cupy,ktnyt/chainer,jnishi/chainer,pfnet/chainer,jnishi/chainer,chainer/chainer,okuta/chainer,ktnyt/chainer,okuta/chainer,chainer/chainer,cupy/cupy,aonotas/chainer