Disambiguation between
Theorem:
(defthm fail-digit-when-match-star/dash (implies (and (tree-match-element-p tree element *grammar*) (member-equal element (list (element-char-val (char-val-insensitive nil "*")) (element-char-val (char-val-insensitive nil "-"))))) (mv-nth 0 (parse-digit (append (tree->string tree) rest-input)))))