pandoc/test/command/toc.md

```
% pandoc -s --toc -t markdown
# A
## b
# B
## b

::: interior
# C
## cc
# D
:::

::: blue
# E
## e
:::
^D
-   [A](#a)
    -   [b](#b)
-   [B](#b-1)
    -   [b](#b-2)
-   [E](#e)
    -   [e](#e-1)

# A

## b

# B

## b

::: {.interior}
# C

## cc

# D
:::

::: {.blue}
# E

## e
:::
```