Fix more shellcheck

libexec/portzap/portzap-erase

@@ -13,7 +13,7 @@ printf "    [*] %s \n" "${gitdir}"
 printf "    [*] %s \n" "${installdir}\n"
 printf "[y|n] "
 while true; do
-    read r
+    read -r r
     if [ "${r}" = "y" ]; then
         break
     elif [ "${r}" = "n" ]; then
@@ -25,7 +25,7 @@ while true; do
     fi
 done
 for dir in "${gitdir}" "${installdir}"; do
-    printf "${dir}  "
+    printf "%s  " "${dir}"
     find "${dir}" \
         -maxdepth 1 \
         \! -name "." \