avoid use of ideep in doctest
avoid use of ideep in doctest

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