change format for grub.cfg

mxgrub/mxgrub

@@ -164,7 +164,6 @@ sub update_grub_cfg {
 	}
 
 	my $GRUB_CFG_NEW=<<"EOF";
-$kernellist
 
 set timeout=5
 
@@ -173,10 +172,17 @@ password_pbkdf2 root grub.pbkdf2.sha512.10000.A1168F03CC3CD47F79848E949584EA624F
 
 set default="$MARIUX_DEFAULT"
 load_env
+if [ -e /etc/local/USB.usb ]; then
+	set default="mariuxUSB"
+	menuentry "mariuxUSB" --unrestricted { save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=rootusb ro ; initrd /boot/grub/initramfs.igz }
+else
 
-if [ \$chosen ]; then
-  set default=\$chosen
-  unset chosen          # must be clear to get a clean value from menuentry
+	$kernellist
+
+	if [ \$chosen ]; then
+		set default=\$chosen
+		unset chosen          # must be clear to get a clean value from menuentry
+	fi
 fi
 EOF