printf '[label [checkbox "filter_course%i" "|%s" %s] %s ] ' \
"$n" "$(HTML "${course##*/}")" \
"$(printf %s "${course##*/}" |grep -qxEe "$2" && printf checked )" \
printf '[label [checkbox "filter_course%i" "|%s" %s] %s ] ' \
"$n" "$(HTML "${course##*/}")" \
"$(printf %s "${course##*/}" |grep -qxEe "$2" && printf checked )" \