Fix some expressions to adapt to tutorial
Fix some expressions to adapt to tutorial

jnishi/chainer,tkerola/chainer,niboshi/chainer,keisuke-umezawa/chainer,kikusu/chainer,niboshi/chainer,wavelets/chainer,jnishi/chainer,yanweifu/chainer,ysekky/chainer,sou81821/chainer,hvy/chainer,keisuke-umezawa/chainer,chainer/chainer,sinhrks/chainer,cupy/cupy,hvy/chainer,benob/chainer,hvy/chainer,AlpacaDB/chainer,muupan/chainer,aonotas/chainer,AlpacaDB/chainer,nushio3/chainer,okuta/chainer,kikusu/chainer,hidenori-t/chainer,kiyukuta/chainer,jfsantos/chainer,kuwa32/chainer,cupy/cupy,delta2323/chainer,anaruse/chainer,ikasumi/chainer,okuta/chainer,chainer/chainer,chainer/chainer,masia02/chainer,ktnyt/chainer,chainer/chainer,keisuke-umezawa/chainer,ttakamura/chainer,1986ks/chainer,jnishi/chainer,Kaisuke5/chainer,tigerneil/chainer,umitanuki/chainer,wkentaro/chainer,nushio3/chainer,t-abe/chainer,niboshi/chainer,tereka114/chainer,hvy/chainer,t-abe/chainer,sinhrks/chainer,pfnet/chainer,ttakamura/chainer,keisuke-umezawa/chainer,cupy/cupy,elviswf/chainer,muupan/chainer,benob/chainer,ktnyt/chainer,jnishi/chainer,woodshop/complex-chainer,ytoyama/yans_chainer_hackathon,rezoo/chainer,truongdq/chainer,kashif/chainer,wkentaro/chainer,wkentaro/chainer,cupy/cupy,woodshop/chainer,okuta/chainer,ktnyt/chainer,bayerj/chainer,okuta/chainer,minhpqn/chainer,ronekko/chainer,niboshi/chainer,cemoody/chainer,wkentaro/chainer,truongdq/chainer,ktnyt/chainer,tscohen/chainer,laysakura/chainer