use Donald's code in 'sub get_chosen'

bringing the white spaces back

mxgrub/mxgrub

@@ -92,13 +92,7 @@ sub get_chosen {
 	my $chosen;
 	open my $p,'-|','grub-editenv','-','list' or die "$!\n";
 	while (<$p>) {
-    /^chosen=$submenu>(.+)/;
-    if (defined $1) {
-      return $1;
-    } else {
-      /^chosen=(.+)/ and return $1;
-    }
-
+          /^chosen=(?:$submenu>)?(.+)/ and return $1;
 	}
 	close $p or die "$!\n";
 	$? and exit 1;
@@ -198,10 +192,10 @@ menuentry "$MARIUX_DEFAULT" --unrestricted { set chosen="$submenu>$MARIUX_DEFAUL
 submenu "$submenu" --unrestricted {
 $kernellist
 }
-  if [ \$chosen ]; then
-    set default=\$chosen
-    unset chosen          # must be clear to get a clean value from menuentry
-  fi
+       if [ \$chosen ]; then
+               set default=\$chosen
+               unset chosen          # must be clear to get a clean value from menuentry
+       fi
 fi
 EOF