Fixed reference documentation: added missing whitespace before automodule.
Fixed reference documentation: added missing whitespace before automodule.

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