Improve printing when using CSV format

Make sure there is always the same number of fields per line.

kvmstats/kvmstats

@@ -90,7 +90,7 @@ done | xargs -n5 | {
     test "$SHOW_AVAIL" && {
         nproc
         awk '/^MemTotal:/ { print int($2 / '$((POW / 1024))' ) }' /proc/meminfo
-    } | xargs -r printf 'AVAILABLE %s %s\n'
+    } | xargs -r printf 'AVAILABLE %s %s %s %s\n'
 } | case $FMT in
 'human')
     column -t