Cleanup

dotfiles/zshrc.d/dmesg.zsh

@@ -1,7 +1,7 @@
 function dmesg {
   if [ $(id -u) -eq 0 ] ; then
     command dmesg "$@"
-  elif id | grep -q '(sudo)' ; then
+  elif sudo -n true 2>/dev/null ; then
     sudo dmesg "$@"
   else
     command dmesg "$@"