Format "eats" blank line before quote block or table

```
This text

> with a quote

and a table

| foo | bar |
| --- | --- |
| baz | bim |
```

is formatted as:

```
This text
> with a quote

and a table
| foo | bar |
| --- | --- |
| baz | bim |
```

See https://go.dev/play/p/ltHIf9FqRKt.
