attrs-scope-chain-mark-1

Single trailing {} on list item with Mark: goes to List (ListItem and Mark get nothing)

§6.1.2

Input

- ::sp:: {.a}

Output AST

- type: List
  kind: bullet
  loose: false
  children:
    - type: ListItem
      children:
        - type: Mark
          name: sp
  attributes:
    - key: class
      value:
        - a