i have already root my nexus4=?iso-8859-1?Q?=2Cbut_why_it_shows_=22shell@mako:/_$_=22when_i_enter_comm?=and“adb sh=?iso-8859-1?Q?command=93adb_shell=94?=

i have already root my nexus4,but why it shows "shell@mako:/ $ "when i
enter command"adb shell"

Should not shell@mako:/ $ be shell@mako:/ #? Or I haven't root
successfully yet? How to check whether my nexus4 have root successfully?
Thanks!