md:
* entry 1
    * entry 1.1
    * entry 1.2
* entry 2
    * entry 2.1
    * entry 2.2

(markdown->sxml* md):
((bullet-list (item entry   1 (bullet-list (item entry   1 . 1) (item entry   1 . 2))) (item entry   2 (bullet-list (item entry   2 . 1) (item entry   2 . 2)))))