CLEAN: Renamed if_option//3 -> dcg_if_option//3. CLEAN: Renamed if_select_option//3 -> dcg_if_select_option//3.
CLEAN: Renamed if_option//3 -> dcg_if_option//3.
CLEAN: Renamed if_select_option//3 -> dcg_if_select_option//3.

wouterbeek/Prolog_Library_Collection