Rename variable to be more clear

init/resize-rootfs-if-needed.sh

@@ -14,10 +14,10 @@ fi
 sysfs_xvda="/sys/class/block/xvda"
 
 # if root filesystem use already (almost) the whole dis
-non_rootfs_data=$(( 250 * 1024 * 2 ))
+size_margin=$(( 250 * 1024 * 2 ))
 rootfs_size=$(df --block-size=512 --output=size / | tail -n 1 | tr -d ' ')
 if [ $(cat $sysfs_xvda/size) -gt \
-       $(( non_rootfs_data + rootfs_size )) ]; then
+       $(( size_margin + rootfs_size )) ]; then
    echo "root filesystem already at $rootfs_size blocks" >&2
    exit 0
 fi