fix: array iteration

syslinux-menu.inc

@@ -24,22 +24,22 @@ function update_syslinux_menu()
     for part in $partitions; do
         version_from_partnum "$drive" "$part"
         versions["$version"]=1
-        for f in $files; do
+        for f in "${files[@]}"; do
             if [ ! -e "$mnt"/"$imagepath"/"$f""$version" ]; then
                 continue
             fi
         done
-        cat >> "$mnt"/items.cfg << (EOL)
+        cat >> "$mnt"/items.cfg << _EOL_
 
 LABEL cloud-init-$version
 MENU LABEL Ubuntu focal (MAAS $version)
 KERNEL $imagepath/boot-kernel.$version
 APPEND initrd=$imagepath/boot-initrd.$version root=PARTLABEL="rootfs_$version" ip=dhcp overlayroot=tmpfs:recurse=0 ds=nocloud-net;s=https://box.sysdeploy.org/cloud-init/
-(EOL)
+_EOL_
     done
 
     # find expired
-    for f in $files; do
+    for f in "${files[@]}"; do
         for i in "$mnt"/"$imagepath"/"$f"*; do
             version="$(basename "$i"|cut -d_ -f2-)"
             if [ -z "${versions[$version]}" ]; then