bug: nested list not working if indent by 2 spaces

Versions

• dumi: 1.1.20
• node: 15.6.0
• npm: 7.4.0
• OS: macOS 11.2.3 BigSur
• Browser: Firefox 89.0.1

Steps to reproduce

Create list with Markdown syntax then dumi dev:

1. xx
  1. xx
2. xx

What is Expected?

Rendered 2-level list.

What is actually happening?

Rendered single level list, but indent by more than 2 spaces will works properly.

[ChristianMurphy]

A point of clarification, ordered lists need three or more spaces indent to nest, unordered two or more to nest.

https://babelmark.github.io/?text=1.+A ++1.+A *+A +*+A 1.+A +++1.+A *+A ++*+A

https://astexplorer.net/#/gist/81dd323bf800689e8e5479cfa7b0ee8d/ec430603d07531397796e126061a8f80b3cb198c

The behavior is consistent across implementations and on github itself:

---

1. A
2. A

• A
• A

1. A
   1. A

• A
  • A

---

why 2 spaces intent item will be treated as single-level item in the most implementations but remark will treat it as nested list

GitHub also treat 2 spaces intent item as nested list

Remark does the same as the other implementations, see the clarification and examples above.

[ChristianMurphy]

This is by design, it’s how markdown works, when markdown has less than the minimum indent for nesting lists, a single level list is created. This is documented in the commonmark specification at https://spec.commonmark.org/0.30/#example-310 and https://spec.commonmark.org/0.30/#example-311

To improve the developer experience, consider using https://github.com/remarkjs/remark-lint/tree/main/packages/remark-preset-lint-recommended#readme to highlight places where syntax may be confusing or misused.