List indentation is incorrect for OL

[zhuochun]

https://spec.commonmark.org/0.28/#list-items

The most important thing to notice is that the position of the text after the list marker determines how much indentation is needed in subsequent blocks in the list item. If the list marker takes up two spaces, and there are three spaces between the list marker and the next non-whitespace character, then blocks must be indented five spaces in order to fall under the list item.

---

Eg 1:

1. abc
  - abc // 2 spaces indent
2. askldjf

Render 1:

1. abc
   • abc // 2 spaces indent
2. askldjf

---

Eg 2:

1. abc
   - abc // 3 spaces indent
     - efg // 5 spaces indent
2. askldjf

Render 2:

1. abc
   • abc // 3 spaces indent
     • efg // 5 spaces indent
2. askldjf

---

Eg 3:

- abc
  1. abc // 2spaces indent
- askldjf

Render 2:

• abc
  1. abc // 2spaces indent
• askldjf