Fix arg_options
Fix arg_options

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