builtin unset + fixed builtin export

srcs/lexing/lexing.c

@@ -6,7 +6,7 @@
 /*   By: lperrey <lperrey@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2021/10/19 08:38:55 by lperrey           #+#    #+#             */
-/*   Updated: 2021/12/01 14:54:22 by lperrey          ###   ########.fr       */
+/*   Updated: 2021/12/05 17:11:31 by lperrey          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -63,6 +63,7 @@ static int	tokenize_input(t_token *t, char *input, size_t input_len)
 }
 
 /*
+	2.3 Token Recognition
 https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
 #tag_18_03
 */