doc: improve Japanese lxc-attach(1)
doc: improve Japanese lxc-attach(1)

Explain that the pipe symbol needs to be escaped for -e and -s.
Update for commit 759d521

Signed-off-by: KATOH Yasufumi <512423cb3a4857a38f472862b51e4ab1a1730f06@jazz.email.ne.jp>

aeris/lxc,ysbnim/lxc,LynxChaus/lxc,federicobriata/lxc,terceiro/lxc,hallyn/lxc,hfuCN/lxc,thmo/lxc,tych0/lxc,hfuCN/lxc,QingweiPeterLan/cs188-lxc,akshaykarle/lxc,ss1h2a3tw/lxc,GreatFruitOmsk/lxc,federicobriata/lxc,thmo/lxc,akshaykarle/lxc,cjwatson/lxc,ss1h2a3tw/lxc,thmo/lxc,hallyn/lxc,akshaykarle/lxc,aeris/lxc,GreatFruitOmsk/lxc,caglar10ur/lxc,caglar10ur/lxc,LynxChaus/lxc,terceiro/lxc,caglar10ur/lxc,hallyn/lxc,QingweiPeterLan/cs188-lxc,GreatFruitOmsk/lxc,tych0/lxc,ysbnim/lxc,federicobriata/lxc,ysbnim/lxc,QingweiPeterLan/cs188-lxc,hfuCN/lxc,tych0/lxc,terceiro/lxc,LynxChaus/lxc,aeris/lxc,cjwatson/lxc,cjwatson/lxc,ss1h2a3tw/lxc