Multi-level lists are not supported

[whatsupbros]

This:

- Q
    - z
    - x
    - c
- W
- E

Unfortunaltely is not properly converted to this:

- Q
-- z
-- x
-- c
- W
- E

This result is given instead:

- Q
    - z
    - x
    - c
- W
- E

As well as for deeper levels of lists.

[SethRAH]

Additionally, when using the * character for the list marker, it does some conversion but the number of *s are doubled.

This:

* A
    * 1
        * i
        * ii
    * 2
        * iii
        * iv
* B
    * 3

Should convert to this:

* A
** 1
*** i
*** ii
** 2
*** iii
*** iv
* B
** 3

But instead converts to this:

* A
*** 1
***** i
***** ii
*** 2
***** iii
***** iv
* B
*** 3