fix shell script

docs/src/templates/setup.sh.mustache

@@ -166,6 +166,7 @@ if [ "$keyboard_shield" == "y" ]; then
         echo ""
         echo "MCU Board Revision:"
         select opt in "${_valid_revisions[@]}" "Quit"; do
+            case "$REPLY" in
                 ''|*[!0-9]*) echo "Invalid option. Try another one."; continue;;
 
                 $(( ${#_valid_revisions[@]}+1 )) ) echo "Goodbye!"; exit 1;;
@@ -180,6 +181,7 @@ if [ "$keyboard_shield" == "y" ]; then
                     boards=( "${board}" )
                     break
                 ;;
+            esac
         done
     fi
 else