IMP(shellcheck): replace ! -z by -n (SC2236)

tests/hardening/1.1.21_sticky_bit_world_writable_folder.sh

@@ -12,7 +12,7 @@ test_audit() {
         describe Tests purposely failing
         local targetdir="/home/secaudit/world_writable_folder"
         mkdir $targetdir || true
-        chmod 777 $targetdir
+        chmod 777 "$targetdir"
         register_test retvalshouldbe 1
         register_test contain "Some world writable directories are not on sticky bit mode"
         run noncompliant /opt/debian-cis/bin/hardening/"${script}".sh --audit-all

tests/run_all_targets.sh

@@ -70,7 +70,7 @@ for target in $("$(dirname "$0")"/docker_build_and_run_tests.sh 2>&1 | grep "Sup
     fi
 done
 
-if [[ ! -z "$failedtarget" && "$nowait" -eq 0 ]]; then
+if [[ -n "$failedtarget" && "$nowait" -eq 0 ]]; then
     echo -e "\nPress \e[1mENTER\e[0m to display failed test logs"
     echo -e "Use \e[1m:n\e[0m (next) and \e[1m:p\e[0m (previous) to navigate between log files"
     echo -e "and \e[1mq\e[0m to quit"