Make the :lexeme pseudo-rule's lexeme status a bit clearer.
Make the :lexeme pseudo-rule's lexeme status a bit clearer.

jeffreykegler/libmarpa,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/kollos,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/kollos,pczarn/kollos,pczarn/kollos,pczarn/kollos,jeffreykegler/kollos