Fix error message
Fix error message

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